"While its rates aren't quite what you could get on Craigslist, The Complete Entertainment Exchange - a British chain that buys and sells secondhand mobile phones, computers, video games and most other electronics - won't have dodgy strangers knocking on your door. The shop will give you more credit if you're willing to trade in your Wii for an item from its stock. And if you're still suspicious, CeX evaluates the condition of all merchandise, and goods come with a 12-month warranty upon resale. 657 Broadway between Bleecker and Bond Sts" (webuy.com).