I have had a dozen or more red dot sights over the years and paid a lot more for less - Atibal AT-MCRD PRO Micro Red Dot Sight

I bought this Atibal MCRD PRO red dot because I am the king of the 'bang for the buck' purchases.
This one was on sale a good bit cheaper than what its price is now, but....even at its current price its a bargain.
I had somebody accidentally drop a floor jack on my rifle which destroyed the red dot that was on it. After I used the jack handle on the guy who was that careless, I had to order a new red dot. I had used this Atibal red dot on a loaned rifle and was surprised at what the guy said he paid for his....just a BIT more than a TRS25, so I thought I'd give it a whirl.
I'm very happy I did. It uses an AAA battery(I use a long life lithium one) which are everywhere, and its well built and the covers for the battery and the elevation/windage covers felt like they were going to be water tight--which they ARE, after finding that out by accident when I had a thunderstorm chase us off the mountain one afternoon.
My conclusion is that there are a good few companies making a LOT of profit off their products.