I had something similar happen to me not long ago. The price tag on and gun game for the Wii had $40 on it, but when I took it to the counter he said it was $80 in the system. His excuse was that someone had removed the sticker that was on top of the $40 one. I could have fought it, but I just couldn't be bothered so I just told em to get stuffed.

And another time when Return to Castle Wolfenstein came out, EB had 2 versions, a tin box and normal cardboard box. Tin box was more expensive. We found one that had the price of the cardboard one on it, and they said that was wrong, it is this price. Realised we coulda fought that as well.

I think the average joe really doesn't have a clue when it comes to these sorts of discrepincies, that they are entitled to get it at the price that is stated on the box.