I dunno, I kept a couple of the games I was considering because ebay was a better route, also because I had not played them enough to decide whether or not I like them(Atelier Iris and Growlanser Generations, which were both around $25 in credit with this deal).
I'd definitely call and make sure the deal is still active before making a long drive, also check prices online to try to judge how much you'll get and if it will be worth your time.
The competing store(Gametrader) gives decent prices on most stuff, but their selection is a little lacking, so I guess if you head out and aren't happy with the values, you could try them.