Sooooo much ignorance in this thread. Sad to see everyone just looking for lowest price.
You can expect to pay $70 to about $500 or all windows and either would be a decent price. You cant just say 3M or Llumar either. Thats like saying Ford or Dodge. Is a Ford better than Dodge? Is a Festiva better than a Ram? Is a GT40 better than a Caravan? Is $40,000 a good price on a Dodge? What... Dodge a Viper or a Dodge Caliber?
There are 3 main types of film.
The first is dye based films. These are the cheapest. They have the worst heat rejection and fade or turn purple the fastest. You can do an entire car with cheap dye based film for $70. Its thin and easy to apply and heat shrinks well. It makes install easy if its decent tint film. 3M has great dye based films if more expensive than the competition.
Second are metallic films. These offer superior heat rejection, longer life and resistance to fading etc vs dye based films. $150-250 for a decent metalic film is not a horrible price for a whole car. Llumar has some excellent metallic films.
Third are ceramic films. These are the most expensive. They offer the best heat rejection, they dont suffer radio inerferance problems as much as most metallic films. They also have low reflectance if you want that. They will never, ever fade. Some are on super thick and hard to form sheeting and very hard to work with. Huper Optik DREI is one of the very best and most expensive of the ceramic films. There are lower grades of Huper Optik though and I dont reccomend the lower grade Ceramic Hupers for the money. Llumar is slightly below average. 3M does not have the ceramic technology to compete yet. The best film is NEVER 3M for this reason... even if they have EXCELLENT dye base films!
So its not just price to tint a car or even what brand or even what technology... its about the SPECIFIC film used and the quality of the installer. Huper Optik DREI is probably the hardest tint to apply, its the most expensive and one of the top 2 or 3 in performance if not the very best. A local tinter has a computerised cutting machine and EXCELLENT installer. Its $500 for an entire car and thats a fairly average price for Huper DREI tint.
Better tints cost more. Better installers cost more. What do you want? Tint that rejects the most heat and lasts forever with perfect cut edges or one that lasts 2-3 years and has to be replaced and has mediocre heat performance and uneven distances on some windows? I have had super cheap $50 for an entire SUV dyed film... it turned puple in less than 2 years, the back window was done in 2 pieces instead of 1, formed a bubble at 2 yeears, etc. I have paid $500 for a G35 done with Huper Optik DREI and the rear glass in one piece with a flawless install and tint super close to the edges. It looked as good after 4 years as the day it was installed. It was impossible to feel the suns heat through the glass.
Its all about what you want in your tint and what your budget is. I may go with Madico cermic MAC3000 this time around... its over 10% less total thermal rejection than Huper Optik DREI but $100 less expensive.
Research what EXACT film you want, not just brand, not just class within a brand, but the EXACT film you want. Get a top 5 tints and go price shopping. Be willing to travel to get the tint you want if it is high end and be willing to pay for a good installer with an excellent warranty. Also, as with ANY custom purchase talk to the INSTALLER to see who is good, not the salesman. The salesman is just there to haggle price. You can ALWAYS haggle price.