Rangefinders are in the "you get what you pay for" category of products.
Last summer bought a Nikon Monarch 2000. They run just under $300. Works well and has proven just as accurate as more expensive units.
Edit: I should add, this is my first laser rangefinder. Last rangefinder I had was in the late 80's and you dial till the images lined up and then read the dial. So I did alot of asking around. Read alot of reviews. And it came down to the Nikon vs a Bushnell model. Just liked the display of the Nikon better. Wheel bow guys I talked to pretty much said not to waste the money on any of those sub $100 models on amazon on account of durability (or lack thereof) and accuracy (lack thereof, too). Figured since I shop in the $300 range for rifle optics, then I wouldn't skimp on the rangefinder. Buy once, cry once...