This is not directed at Thall... but this comes up often. "Price fixing" is not when a seller and a buyer (dealer in this case) agree to a certain set of conditions.
Selling at one price throughout the USA is not uncommon outside of the chainsaw business - it's called "Unitary Pricing". The company I worked for in the early '90's did this on satellite receivers. All dealers agreed to sell at the listed sales price, within very small limits. Ever notice that it was really hard to buy anything with the Sony name on it for less then "list" in the 90's unless it was a "gray" import? Even now, it's certainly not a "free-for-all".
Whether a company sells as Unitary Pricing or not is a complicated issue. Google "unitary Pricing and you get links like this one (not the best example):
http://academic.brooklyn.cuny.edu/economic/friedman/mmpricing.htm
Maybe there is a lawyer than can explain the issues clearly to us all... Where is computeruser when you need him??