I, Randy Rowley, recommend Night Owl Optics. Not only do they make great night vision products, but they have excellent service as well. I bought a very used monocular on Ebay for $60.00. I used it on three hunts. On the fourth hunt it wouldn't come on. I tried a new battery but still no-workie. I shipped it back to Night Owl. They sent me a new unit (retails at $269 at Sportsmen's Warehouse) and it only cost me $79. This was an extremely good deal because the unit that I sent in was no where close to new and it was long past their one year warranty.