I'm going to sleep on this deal. It looks tempting at first, but looking at some of the feedback the seller is getting I'm suspicious of why the price is so low. It looks like some of the new items they sell are occasionally refurbished, and even a fair bit of the new (sealed) stuff they sell has had parts missing.
I could be wrong, but it looks to me like they buy up what manufacturers would consider defective or "off" batches. Sure, you might get a good bit of perfectly fine games in those batches, but what if you get one of the screw ups?