I'm really sorry to hear that direwolf. Were any of the blades LE with a # on it, or did you mark them with a UV pen or something similar? That way you could keep a lookout on ebay, and other places. In fact keep looking there. Pawn shops are a good idea too, once you spot your knives, call the cops to come into the shop, they should be able to lift your prints from the blades and the owner should be able to identify the seller.

Also keep a look out for suspicious people hanging around the parking area and call the police, it may be the same people.