Okay, here is how you do it:
First you need to find out what exactly you want (obviously).
Then find one of those stores that have one of those policies that says "if you can find the product for cheaper then we will beat it by xx%." *where xx is a percentage value.
Then find the product at www.microcenter.com or super cheap another store. Wala, you get a great deal.
Here is an example:
All-In-Wonder 9800 Pro 128MB 8x AGP Video Card
Then go to or circuitcity.com or another store with and find the same item and such a policy:
Online Price Match Plus Guarantee
And you save some serious dough!