I have an iphone 4 with a crack in the screen (small but annoying as it affects functionality). I will be eligible for a new phone soon, but I will be studying abroad next semester, so I am going to hold off until I get back (won't be able to use it there, I have already looked into plans/unlocking and talked to friends who went last year). I know I can just get the screen replaced or do it myself, but I think there might be a few other issues. I found this on ebay, and I am looking for alternatives.
http://www.ebay.com/itm/Trade-in-Your-broken-iphone-For-Working-New-One-Iphone4-/320723689302?pt=LH_DefaultDomain_0&hash=item4aac9f1f56
Basically I want to trade it in, but does anyone know if there is a cheaper way to do it? I would like it to be under $100, and just for reference I have the black 32gb one. So does anyone have any experience with this? and lastly as a side note, does anyone know any diagnostic sort of utility I could use to see if there are other problems? I have restored it a couple times, and I used to be really good at this stuff, but I just haven't had the time to stay up on it in the past few months.