Around here, the dealers are cheaper than the gunshows.
If you drive an hour, up to Knoxville, the dealers may be more expensive than the show.
You need to try several different dealers, then check the show prices.
Be educated.
Also, consider what you want to use the gun for.
If for long range accuracy, you may want a 20" non-chrome lined heavy barrel.
For plinking, and home defense, maybe a 16" M4 profile, chrome lined, mil-spec, so you can shoot any ammo.
Bushmaster makes quality guns, and sells way more than the competition.
Prices are around $800 around here before tax and background check.
Colt, Oly, and Armalite also make a good
product.
The Maryland AR15 Shooters site has a lot of good info:
communities.msn.com/TheMarylandAR15ShootersSiteEnjoy the hunt!