I used to tint for a place here in florida called "AutoTrim Design"its a nationwide company, or at least used to.
for a 2 door car we would charge 119, 4 door, 129..hatch or no hatch, that was the price...and our backwindows (hatchback) isn't too difficult of a window
if you can get it less than that, you are getting an awesome deal.
when I tinted, I made 35% of the sale.so just remember.. the less money you pay...more than likely....the less quality you will recieve.
I tinted my car for all of 15dollars

cost of tint..hehe.Llumar 15%
goodluck in finding a place that will do a good job... and ask to see some samples of the tinters work (like their personal cars, or customer cars that were just tinted)
if there are problems with it, (like air bubbles, or dust in the tint) don't be afraid to take it back to them so they can fix it.
-Dan