What is the value of a Winchester model 94 US Marshal bicentennial rifle only 500 made?

Go to winchestercollector.org link this may help if it was a 200th anniversary rifle. This was made for the U.S. Marshals Service not the Association like you indicated. The 225th was made by AmericaRemebers for the Association and another tribute Wellington LTD Henry .45 edition anniversary verson.

These were a "special edition": made for the US Marshal's Association, and not an Official Winchester Commemorative rifle While yours is probably a very nice rifle, it is not sought after by the dedicated collectors of Winchester Commemoratives. With the small number of these rifles, there will not be enough "comparable sales" to establish a market value. To someone that has BEEN a US Marshal, it would be priceless. .