Bushmaster's website doesn't list Manufacturer's Suggested Retail Prices on their rifles.  Any idea where to find this info?  I'm particularly interested in the price of a XM15 E2S 20" A2.

I know I can look around and compare prices from different suppliers, but this doesn't tell me if the local Mom and Pop is charging a fair price.  They might not get the same volume discount as a big chain, for example.