This week I took a look at some options for people who want to get rid of old electronics, one way or another. The good news is that there are a handful of Web sites that make it easy to do this — and some of them may even pay you for your old products. The bad news is that you’ll likely receive only a fraction of what you originally paid, especially if you waited a while to get rid of it.

Some sites, like Gazelle.com and VenJuvo.com, offer cash for your items and/or will recycle products. Another site, TechForward.com, lets people pay a fee to “lock in” a value for how much the site promises to pay for the product in the future. MyBoneYard.com accepts only laptops, desktop PCs, cellphones and flat-panel monitors, and gives Visa (V) gift cards rather than cash.

I was surprised to receive significantly different value offers from Gazelle and VenJuvo when trying to sell the exact same products on each site. In one instance, VenJuvo offered me $30 more than Gazelle for a digital camera; another time, I got $15 more from Gazelle for an old Apple (AAPL) iPod. It’s worth the extra step to shop around at more than one of these sites before getting rid of something.

Both ask a few questions about the item, including its condition and whether or not it still has the accessories that originally came with it. Gazelle determines a product’s value using retail — think Amazon (AMZN) and eBay (EBAY) — and wholesale channels; VenJuvo uses similar criteria and also looks at competitors’ prices.

If you worry about someone stealing your digital data, you’ll likely not feel comfortable dropping something in the mail that’s chock full of personal information, especially if it no longer powers on to allow the owner to wipe this information.

Both Gazelle and VenJuvo accept at least some types of digital cameras, laptops, MP3 players, GPS devices, camcorders and gaming consoles. Gazelle also accepts cellphones. But they don’t take everything. Gazelle doesn’t take LCD TVs and VenJuvo doesn’t accept satellite radios and portable hard drives or any smartphones or cellphones other than the iPhone; neither accepts desktop PCs.

I took the closest look at newly released Gazelle, owned by Second Rotation Inc., and walked through the simple start-to-finish process of selling a gadget and receiving money from the site. After pulling up the site, people can find their product and its value by choosing from a list of nine categories or by typing some part of the product’s name into a search box.

I sold Gazelle a first-generation iPod Mini with four gigabytes of memory for which my boss paid $249 in 2004. I answered a few questions about the product: Yes, it still powered on; no, I didn’t have the original AC adapter, manuals or software installation CD, and it was in “excellent” condition, according to my assessment. Gazelle placed its value at $25.

At this step, I opted to add the iPod to my box and check out, but users can also add other items to a box, including electronics for recycling. Gazelle’s policy is that it pays 100% of shipping costs for any box shipped to the company, so long as there’s at least one item in the box worth $1. Eighty percent of transactions qualify for a free box; the rest can be sent with printed-out prepaid shipping labels, but you must find packaging.

Gazelle lets users receive payments via a mailed, paper check or using PayPal; money is received either way within five business days. People can also donate their money to one of 23 causes, including the American Red Cross and World Vision. I opted for PayPal, and the $25 amount was deposited shortly after Gazelle received the iPod.

I sent the old iPod to Gazelle in a brightly colored, empty box that arrives at a customer’s door a few days after he or she sells the device to Gazelle. I secured the old iPod in the box using balled up paper, and sealed it with packing tape. A prepaid shipping label was already stuck to it, and I needed only drop it off at UPS.

If Gazelle receives a product and decides that it isn’t worth what you said it was — either more or less — and you’d rather not sell, the company will ship the product back, free of charge. But while Gazelle’s site guarantees users that they’ll receive their money, and that personal data are safe with the company, no money-back guarantee is offered.

Gazelle hopes to calm nerves by posting detailed instructions on the site about how to wipe a device of all private information. But the company hasn’t yet done this, and numerous users will remain skeptical even with such instructions.

I also poked around on VenJuvo Inc.’s Web site of the same name, www.VenJuvo.com, which is derived from two Greek words meaning “support, assist and delight sellers,” according to the company. This site, too, buys products back from people, though it pays via check, PayPal or Kmart (SHLD) gift card. Users fill out similarly simple questionnaires on each product to help assess value. Unlike Gazelle’s style of mailing boxes to users, VenJuvo gives users only prepaid shipping labels to print out and stick on a box that the customer must supply.

One notable difference between the sites is Gazelle’s broader range of products. In the case of digital cameras, for example, Gazelle accepts 80 brands while VenJuvo takes only Canon (CAJ), Sony (SNE), Olympus and Kodak (EK). Unlike with Gazelle, if you send VenJuvo a product that isn’t worth what you said it was, the company won’t return the product free-of-charge; instead, it will charge you for shipping.

If users choose to receive a gift card, they get a 10% added value. While VenJuvo doesn’t let people donate a product’s value to a cause, it will add this feature next week and will include different causes (like Ronald McDonald House and Big Brothers Big Sisters) than those found on Gazelle.

Unlike Gazelle, VenJuvo will always take items for recycling and will pay for the shipping, regardless of whether you traded something in for a value.

A useful resource for general electronics recycling is the Consumer Electronics Association Web site, www.MyGreenElectronics.org, which locates nearby electronics-recycling centers according to ZIP Code. And almost every computer manufacturer has a recycling program in place; some will even recycle computers that aren’t their own brand.

One way or another, it’s time to clean out the old junk drawer. Just be sure to do some comparison shopping if you want money for your old products.

Edited by Walter S. Mossberg

Write to Katherine Boehret at mossbergsolution@wsj.com

That’s especially true now as more users decide to buy computers running Microsoft’s recently released Windows Vista operating system. Apple Inc.’s campaign encouraging users to switch to its platform from Windows has also contributed to PCs piling up in basement corners.

But where should all this old equipment go? And what happens once it is taken away? How can you be sure that your private data aren’t being exposed? And will being a tree hugger turn out to be too costly?

If you’re looking to recycle your old system — monitor, computer tower and printer — you might think the only option is to search for a local drop-off spot. But surprisingly, most big-name computer manufacturers offer their own recycling programs, some of which come right to your door.

Hewlett-Packard says it will have collected and recycled one billion pounds of used products by the end of this year.

Each company has its own methods, which makes the process more confusing for consumers. Some take old computers away, but charge you around $30 for the shipping and handling. Others will reward you for buying one of their systems by offering to remove your old system free. Below, you’ll find some general guidelines for getting your computer out of your house.

Which company does what?

Dell Inc. offers home pickup of any old Dell equipment anytime, free. It will also pick up any brand of computer or printer free with the purchase of a new Dell PC or printer. Details can be found at www.dell.com/recycling.

Hewlett-Packard Co.’s recycling procedures are a bit more complicated. At anytime, the company offers to pick up and recycle your old equipment, regardless of brand, but charges $13 to $34 per product for shipping and handling. You will be compensated for each product with a $30 to $50 coupon to be used at www.hpshopping.com, where you can buy products from H-P. Recycling details for H-P can be found at www.hp.com/recycle.

Lenovo’s ThinkPlus Recycling Service offers prepaid shipping labels for $30 each to be used for sending any manufacturer’s old system, monitor, printer and peripherals to Lenovo for recycling or refurbishment. Lenovo doesn’t offer a home pick-up service. Once received, Lenovo uses a designated center to recycle your materials and sends reusable equipment to Gifts In Kind International, a charity specializing in product philanthropy.

Apple is different still. Like Lenovo, it doesn’t offer home pick-up but will receive all brands so long as you buy a $30 shipping label from the company’s Web site. With the purchase of any new Mac through Apple’s Web site or at one of its retail stores, you’ll receive an email with instructions and shipping codes for up to two prepaid boxes. These can be used for shipping any old equipment, regardless of manufacturer, to Apple for recycling. Details can be found at: http://www.apple.com/environment/recycling/program.

Apple’s retail stores will accept all manufacturers’ rechargeable batteries as part of a program run by the Rechargeable Battery Recycling Corp., a nonprofit organization. These stores also accept unwanted iPods for recycling and take 10% off the purchase of a new iPod in exchange for your old one.

What about my data?

When recycling, almost all companies vow to mechanically shred your hard drive. But they also suggest that you take responsibility for your data and delete them to be safe.

Various software programs let you clear out your hard disk on your own. Symantec’s Wipe Info in Norton Utilities and System Works (http://symantec.com) will help on Windows PCs and Macs. Webroot Software Inc.’s Window Washer (http://www.webroot.com) is another option for Windows, and Jiiva Inc.’s SuperScrubber (http://www.jiiva.com) is an alternative for Macs. I haven’t tested these programs, and there are many others that do the same thing.

What happens to my computer?

Generally speaking, after your computer is sent to a recycling plant, it is disassembled and its materials are separated, melted down and reused. H-P, which has been recycling computers since 1987, says it will have collected and recycled one billion pounds of used products by the end of this year. The company uses some materials over again in its own products, such as plastics that are melted down, combined with plastics from recycled water bottles and used to make one of H-P’s scanners.

Recycling alternatives

Plenty of other groups, such as the National Cristina Foundation (http://www.cristina.org) and Share the Technology (http://sharetechnology.org) specialize in distributing reusable computers to people or organizations in need of computers.

For the most part, the best systems for reuse are those that are less than five years old. A good rule of thumb is to donate your computer as soon as possible, so you don’t forget about it before it becomes outdated.

Microsoft specializes in PC refurbishment by partnering with TechSoup, a tech nonprofit, and by labeling groups as Microsoft Authorized Refurbishers. These groups, which are located around the world, receive low-cost software licenses so they can install Windows and Office programs on refurbished computers for distribution to low-income families, nonprofit and educational institutions. In the U.S. alone, over 100,000 licenses have been supplied to 400 such groups. A list of them can be found here: http://www.microsoft.com/mar.

With Earth Day coming on April 22nd and “going green” becoming a fashionable proclamation, you’re sure to find more and more options for recycling your computer or sending it away to someone who can refurbish it. One way or another, your old computer can be used for much more than gathering dust in a basement corner.

Edited by Walter S. Mossberg

• Email MossbergSolution@wsj.com