[quote name='Corizzle']I don't see anything about how this is a guaranteed price, but it does mention that. Other pre-orders sometimes mention date subject to change but I haven't seen Best Buy say that price could change.[/quote]
When I pre-ordered Halo 2 back in the day, I managed to get it for $10 cheaper than normal due to a discount on the P.O. price. You've got nothing to lose by pre-ordering now; Either they honour the price and you get a deal, or they change the price and you can just cancel it.