I have a Vortex Strikefire that looks very similar to an Aimpoint, and also a C-more reflex sight. Contact me if you are interested. I also have an Eotech 557, but you are trying to remain under $300. If you are looking for a new one, I would recommend the Vortex Strikefire. It has red/green dot option, and is nightvision compatible and just as durable as the more expensive red dots.