I am planning to sell my black 3gs 16 gb phone. I am eligible for the upgrade pricing because i used another account to upgrade the current line. I want to sell it on craigslist. Just curious... 1.) do i leave in the sim card or take it out? 2.) on average how much do you think i can get with the original box included + 1 screen protector from apple and 1 used Incase case, the phone has only very minor scratches at the 2 top corners but thats it. 3.) what's the best way to wipe all information off the iphone before selling it? 4.) is it worth it, and by that i mean will i appreciate the upgrade and even make money off this if I can get more than $250 for this phone (16g Iphone 4 runs about $236 after activation + taxes) *** yes i know mroogle exists but I used it and did not come upon a question like this so please help me out.