The higher cost that is involved, comes from the poly/cotton fabric, that does not shine in the sun. There are some different qualities in the double bull that are not found in any others, there are some differences, most the time you'll find that if you can find a cheaper blind seven out of 10 people will purchase the lower price one, not that there's anything wrong with that, I spend hours in my blind, and I have to cart it, at least a 1 1/2 to 2 miles, I wanna make sure it works when I get there, and I don't wanna compromise in the position that I have to put it in because of the Sunshine. But the cheaper ones do work you just have to branch them in a little better to get the shine off the fabric. I know double bull blinds their 10 years old and still working. And it says a lot about them. And the thing is they can still get maybe 60% of the price out of them if they sell them, that's a big plus too.
The important thing is to find one that works for you, and that's all you need
Carl