So, Ive upgraded to an iphone 4 and I'm now looking to get whatever I can for my old refurbished black 3G. I had a case on it for about a year, until it broke. So the back and sides have been naked ever since. The logo has a noticeable scratch going through it. Ive also recently noticed a hairline crack near the 32 pin connector. No clue how it got there, I haven't dropped it or anything in a long time. Ive had a screen protector on it since day one, so it should be flawless. Its on 4.01 firmware, jailbroken but not unlocked. 16 gig I'm in the US if that makes any difference. I understand AT&T gives you money for them? Any idea what they give you for them? Would I be better off using some other means? How much is it even worth these days?