some info on detailing options:
a speed wax or spray wax will run you around $50 at a car wash and is not worth the money at all in my opinion. it's no different than using a quick detailer type spray yourself and will wash off quickly.
a carnauba based "hand wax" costs $75 to $100 and will hide some scratches and make things shiny for a few washes. this is what i typically get 3 or 4 times a year. i can usually get them to throw in an interior detail with the hand wax