So, I just discovered this service and I'm probably late to the party. But, I have a bunch of Blu Ray discs that are either unopened or were watched once that I'm considering trading in. Sometimes, when searching for titles, several come up of the same type with a few cents difference. Of course I would pick the one with most value, but I just don't understand the difference. Also, it says that price that it projects isn't guaranteed until it is delivered and inspected. I don't mind receiving a Amazon GC since I do a lot of shopping on there. What concerns me however is that do they ever lowball you once they receive the product? Claiming that it's not "good," "new" etc? Or do they pretty much agree with you unless there is a really big difference in physical condition of the product? Thanks!