I just got back from Best Buy where I picked up Midway Arcade Treasures and Robotech Battlecry for $5. I also got Nightshade for $15. I am interested in the game, and I had a decent time with Shinobi, but I've been reading a lot of negative reviews. Should I hang on to it, or try to trade it to my local FYE (where they have a used copy for $26, so I would think they'd give me $30)?