The number he gave wasn't definite, it was just meant to be an example from his experience. All he really said was "It's cheap and old", not "It's exactly less than $15.00 and more than $9.00" or something silly like that.The only problem is that it's too cheap, 4 for $20
http://www.gamestop.com/nintendo-3ds/games/cubic-ninja/90784
Although he did buy a copy off ebay