The LBS I manly use, Charges $50 for a Tune up. The go over the bike, derailleurs, brakes, chain, etc, and they true the wheels on the bike for that price. If you want them to take the wheels off and true them on a stand, its $20 a wheel. As for the fitting, the shops that I talk to do it for $75 to $150. You get what you pay for. I payed a guy who "trued" the wheels, and then I started having spoke popping. I payed him $10 a wheel, to do it. It ended up the guy never even trued the wheel, and didnt tension the spokes.
Pay the extra money, go to a real shop and if the shop owner wrenches get him/her to do the work. They will want you to keep coming back so they will most likely do it right.