Fair Price.

Hey, I already have a bagged fullsize chevy, and I just bought 8 new valves, 2 new front bags, and some air line. Now I would love to do the work myself I just really dont think I would be able to do it and it would be in pieces forever if I did it. Anyway, what do you think would be a fair price for somone to install the new bags, and make my truck hit sides? They would prolly have to supply a little more air line, some fittings, and a new switch box. What do you guys think? Thanks!