The gamestation round here is a nightmare, their prices are all over the place, I think the staff are a bit on the dim side. It isn't uncommon to see 3 identical items in the window at different prices, and you go in and ask for the cheapest one, then when they get it they say "oh sorry it was priced wrong" and then charge you the proper price ¬_¬ ... isn't there some law regards doing that?
Yep,l The law is basically, they can either sell it to you at the advertised price, or not sell it to you at all. Few shops follow that though....
Same in the US. If they say it's priced wrong, it's called "false advertising". Just ask for the manager and throw a fit -- they will sell it to you. If not, you file a claim at the Better Business Bureau and probably won't get the game.