I think I'm going to upgrade to the 5, but I'd like to sell my 32 GB Verizon 4. It looks like Verizon will give me $150 for it, and Ebay prices seem to be around the same so Verizon would be the best way to go because it is easier. Am I missing out on other options I should be looking into?
Amazon. Not sure how much they are giving now but I sold my 3Gs in "good" condition for $78 or so. My trade is still processing but I'm getting a amazon giftcard as payment. Not sure if you can get cash or only Giftcards though.
Before the 5 was released they were giving nearly $100 for the 3Gs but prices went down as more people traded theirs in I think.
Boo. I read an article a long time ago that listed four places to trade in electronics, but I can remember all four. Looks like Amazon is your best bet.