I bought a auto-levelling 2-axis green rotary laser for $90 from Wuhan and it's every bit as good as the $900 Dewalt. I didn't need it...but again...a green laser. I used it as a prop. I just would turn it on when customers were around to make myself look space-age. In reality, I was always just guessing and eyeballing shit.
That's why I'd prefer not to go to war with these guys.