I did something like that before. I bought a digital camera for 150, at Future Shop, then it went on sale at Best Buy for 140, so I went back to Future Shop and get the $10, and they also give you an additional deduction which is the 10% of the difference in pricing. So I got like $1 off, cause the price difference was $10 and 10% of $10 is $1. At least its better than nothing I guess.