"Good price" is not what you are looking for, with this kind of work. "Great quality" is. Focus on shops that have great quality (not just say that, but show you samples that prove it), then decide if you want to spend what a "great quality" shop will charge.
Otherwise you could end up with a poor job, and be unhappy.
This is my first experience with paint protection film so I don't really know if it's supposed to look like this or not. The way people go on about it on the interwebs makes it sound like it usually looks just fine. Anyway, I thought I'd give it a try so I went to the highest rated place in...
teslamotorsclub.com
(no idea what the OP of that thread paid, thats not what I am saying. I am saying, however, focus on the shop quality first so you dont end up with a PPF job like the one shown by the OP in that thread, who is unfortunately having to deal with the fallout of that).