hello, i just had a couple questions and was hoping someone might be able to answer them. right now i have a iphone 3gs 16gb, i want to upgrade right now, but i wanted to know if people who did that upgrade to the iphone 4 are happy with it. and also what are good ways to sell the 3gs? i found a cashforiphones but i dont know if its good way to go, they offer me 190 for it, where gazelle offers 137 huge difference. i havent used ebay much, last i did, it was set to a paypal. is there a way i can get it to my bank account? im sorry for all these questions, just want to be sure before i make the jump lol.