I'm considering selling my iPhone 4 32GB (iOS 5) on eBay it's in immaculate condition as I've only had it for a few months. I'm based in Spain so it's locked to the Vodafone Spain network (still under contract with them). Would I get a better price if I jailbreak the phone and unlock it or leave locked to Vodafone? If the phone sells would it be advisable to send copy of contract & guarantee with the phone? I'll probably have to sell on eBay Spain.