Hey everyone, I want to sell my iPhone 3G 8GB on eBay - it's currently locked to O2, so should I pay the £15 or so fee to unlock it officially first (is it worth it?), or jailbreak it, or just let the buyer unlock it themselves? Also, how much do you think I can get for it? It's in good condition (some wear, but no scratches on the screen) and works perfectly, but has a crack on the back that's noticeable if you look closely? Any advice appreciated!