why are window deflectors so expensive?

I just can't figure out why window deflectors so expensive.

Looks like WeatherTech's the top shelf item and AutoVentShade (AVS) is #2.
And this video really makes the AVS's look like #2 too - window won't even close after they're installed.
https://www.youtube.com/watch?v=YGfq7QwNGg0

A set for 1st gen double cab Tacomas are like $100 for the WeatherTechs and $60 for the AVS's.

And both those prices seem so high for 4 strips of plastic with some adhesive included. I mean, you can get

Amazon Basics Microwave, Small, 0.7 Cu. Ft, 700W, Works with Alexa

a new microwave oven for $60.

Anyone 3-D printing or have some other hack for DIY window deflectors?

 

If you get the ones that 3m tape to the paint they are much cheaper

 

I just put the AVS units on my Access Cab. $33 or so on Amazon. Work perfectly fine and the windows do completely close. Follow the instructions and leave the windows up overnight (at least) to fully seat the shades, done.
After skimming though the vid, it appears that reading and following instructions are not required to make a comparison video. YMMV...

 

I don't have a 1st, but if you check Amazon under the Used and sold by Amazon Warehouse section, you can get them balls cheap.

I paid $22 for a new set of AVS vent visors which were marked as used. Still had the same return policy as new from Amazon. I got them and they were just missing a small scotch brite pad and just taken out of the cardboard vacuum seal wrapping.

 

I had problems with my weathertech, different truck, but still a problem, they have good customer service but the engineering behind the expensive product didn't work for me. I'd avoid them, I am from now on.

 

I have avs for a dcor $40 bucks new no problems.