ORIGINAL: meef rustler
At my LHS they tune, fix and even paintbodies. You always see someone drop off their broken rc.
Maybe you live somewhere that has a large enough shop that they can afford the extra staffing to do all that work, but the problem is for the endeavor to be profitable they'd have to price their labor costs beyond that what most people would be willing to pay (or do shoddy work). But in most places, especially considering the tight profit margins on kits and rtr's today thatshops simply can't afford the extra staff neccessary to tune, fix, or especially to paint bodies.