Amazon's brand new trade-in service will pay me $366.20 in store credit for a random sampling of gadgets, games, and stuff I gathered from around my house. eBay will (depending on the final bid) pay me about $546.24.
Granted, selling things on eBay requires a bit more time, effort, and overhead, but if it's pure return-on-investment results one's after, the original auction site is still tops.
Amazon launched the "Trade-In" beta service this week, and so far there are 2,550 eligible items available for trade, in four categories: textbooks, movies & TV, video games, and electronics.
Essentially a user just selects an item they'd like to trade, prints a free shipping label, boxes it, ships it, and waits for the cash to be credited to their Amazon account or sent back as a gift card.
Here are a few items I picked for comparison purposes (prices picked from a random, average listing).
Bottom line: Amazon's service is great if you just want to get rid of something and don't want to fuss with making an auction listing, waiting for it to end, and dealing with a random person. But the money you get back from Amazon can only be used for more Amazon crap, which, granted, is a lot of crap, but it ain't cash.
eBay's a pain sometimes, and there are more steps involved; plus there are listing fees and PayPal cuts from what you make. But even with all that, eBay still brings home the best pay day.