Local shop around me wanted like $400. Not too bad, but that included doing minor body work to the kit, b/c the kit was fiberglass, and didnt come perfectly. But if you know how to use a drill, have basic math skills, and have alittle common sence, its not hard at all. Plus, itll be FREE if done by urself.
To have it installed AND painted, they wanted $750 or so. It all depends on the bodyshop, and what the bodykits made out of (fiberglass, ABS, polyurethane, ect.)