Some things you should never try to get at a discount: Lunch meat. Surgery. Hiking boots. Back waxings.
And you should ESPECIALLY avoid back waxings at cosmetology colleges.
First of all, there's none of that zen atmosphere to give you the illusion that the experence is one of calm and tranquility. No dim lights. No soothing music. No sheets on the bed. In fact, there's really no bed; it's just a padded vinyl chaise that wobbles so much they'll ask you just to sit on the end of it to avoid potential collapse.
Then there's the whole amateur-with-a-pot-of-wax factor. Amateurs are clumsy. They slop wax on your jeans. They miss enough wax that you find yourself surgically attached to your coat when you get home. They miss enough hair that you wonder why you drove clear across town to save a buck when you could have done a more thorough job on your own with nothing more than a can of paint thinner and a match.
And speaking of saving a buck, that whole cosmetology college = deep discounts thing is a myth. They may cut your hair for only five bucks, but they'll end up charging you a dollar more than you'd pay at Nordstrom Spa for a more thorough waxing procedure. And Nordstrom Spa offers all that zen crap you thought you could live without. Hell, Nordstrom Spa even gives you complimentary bottled water.
On the flip side, though, Nordstrom Spa also gives you an immediate case of post-waxing pimples. And so far, the cosmetology college route has given you nothing but (mostly) hairless skin. But maybe the pimples are part of the post-graduate work.
Wobbly vinyl chaise + Shania Twain + Clumsy McWaxSlopper = bad
Indirect lighting + fresh sheets + fake bamboo in the lobby = good