I was just wondering how much do you think an iPhone 3G 8 gig would be worth if I sell it today? It's unlocked, has a couple of cosmetic blemishes (scuffs, scratches,etc.), and the on/off (sleep) button doesn't work but its in perfect running condition other than those flaws. Also do you guys have any tips on how to sell it on eBay? What should I watch out for and what should I make sure I do? Thanks guys!