There's a chance that your electronics can make you a bit of cash (beyond the usual suspects of Craigslist and eBay). Typically, when you go to sites that purchase old gadgets, you fill out a form describing what you want to sell and the shape it's in. You then get an offer. If you like the offer, you ship the device to the site and they inspect it to make sure it matches what you described. And then -- you get money for it.
To find out what these sites will accept, I tried to sell them a flawless Wi-Fi iPad 2 with 16GB of memory, and a flawless Motorola Droid X2.
This site buys a variety of electronics, but it's a bit confusing to use, because it's not clear what devices it will buy. The items it lists include Apple laptops, GPS devices, e-readers, Apple displays, iPods, Apple accessories, digital cameras, wireless cards, PDAs (remember them?) and iPhones. In fact, though, when you explore the site, you'll find that it buys more than that. So your best bet is to type what you want to sell in the search box and see if BuyMyTronics.com will buy it. It offered $250 for the iPad 2 and $63 for the Droid X2.
Consumer Electronics Recycling
You can sell a limited number of smartphones, cell phones, iPods and PDAs here -- it buys only Apple, Palm and RIM equipment, and not every model. If the site doesn't buy your device, you can donate it instead, but you'll have to pay for shipping.
Recycle through this site and you get a gift card from Sam's Club or Nex Navy Exchange, or a prepaid Visa card. Select which you want, choose your device, answer a few simple questions about its state, and you'll be told how much you can get for it. For the iPad, it offered $209, and for the Droid X2, it offered $43.
This site specializes in buying Apple gear, although you can also sell a variety of mobile phones from other manufacturers, including BlackBerry, HTC, Motorola, Samsung, Nokia and others. Select the product you want to sell and its condition, and the site makes an offer. Payment is via an Amazon gift card, a check or PayPal. For the iPad 2, I got an offer of $230, and the Droid X2 got an offer of $63.
This site works like most of the others -- tell it what you want to sell, describe the condition it's in, get an offer, send it in. It offered $245 for the iPad 2 -- more than Gazelle but less than NextWorth -- but would not buy the Droid X2. You can get paid via PayPal or by check.