I am not a medispa, so not sure what a unique approach would be.
But as to your question - it bothers me that most places don't list any pricing. What do they have to hide?
I know that in some cases it can vary, depending on the service, time, area covered, amount of product used, etc...however some people "shop" around on several websites. I would appreciate the business that gave me the most information about the service - including at least a "ball park" or range of cost for that service.