info on 72 Demon stripe kits

It's not so much about the price as it is the quality and of course wondering about the price difference. When I shop, I could care less about a name brand. Just don't like being taken advantage of unless she's nice looking. It's always good to research before buying. I've put a lot money into this, now, rust free H code car but don't want to just give away an extra $100. Just about anything 3M is good quality. Thanks for the input so far.