Stuntmen and Actors are trained and experienced professionals. The wages depend on area of the country and whether it is a union shoot. An extra amount is paid for these items. On a union shoot this should be at union rates, with a union contract. Union actors receive residuals for each time a product is shown in a new market or contract period.
Reenactors combine some of the aspects of all three categories.
They are background extras, sometimes they are asked to do what is actually light acting or stunts and at times more. There are two problems with doing something for less than it's worth. First you short change yourself, second you anger the professionals by downgrading their efforts and undercutting what they have worked long and hard to build. The short changing of yourself should be a good enough reason to know what your worth, what is reasonable and get it. You have invested a lot of money in uniforms, equipment and accessories.