I just called two guys Saturday about doing a tint job for my GP. One informed me that he would charge me $360.00 for all of the windows to be tinted with 3M Window Film, while the other guy said he would do all the windows for only $200.00 with a five year warranty using Johnson Window Film. The price different was unbelievable. I'm not sure why there is such a huge price different, but I'm willing to go with the cheaper option. Now if you just want your back window tinted I can imagine it would cost probably around $80-$110 to have it done properly. Nothing drops the value of the car faster than a horrible window tint job.