A friend told me about this website -- since I just got a new phone (iPhone 4, I love it!), I wanted to sell my 2-year-old Android G1 phone. I did like that phone a lot, but it's gotten really slow over the past few months for some reason.
Anyway -- they're giving me $82 and paying for shipping. I'm amazed it sells for that much! You can sell all kinds of electronics (and movies and video games on the site).
If you have stuff to sell, use this link and I get $10 and I'll owe you a drink!