The title pretty much says it all, I have an Aimpoint 3x magnifier in an Aimpoint twist off mount. The magnifier sells for $520 new, and the mount is $200 new––I'm selling both for $500 $450 shipped!!. The only issue with these is the mount has some dings, but it is all 100% as far as functionality. You could touch up the mount w/ black paint and it would look new, I just wanted to let the buyer see exactly what it is. The optics are in great shape and the quality is top notch. These are authentic pieces, I can show you what to look for if you aren't familiar and they are serialized to prove it.
If you haven't used these mounts, they work great. You can attach/detach the magnifier in a split second. Unlike flip to sides it detaches so you don't carry around the weight of the magnifier when it's not in use.
The ONLY trade I would be interested in are low powered scopes, something like 1.5-8x, 3-9x or 2.5-10x at the most. I am willing to add cash if it's a nice Leupold, Nightforce, etc and I am not interested in anything too low end. I prefer a 30mm tube on it since I have a nice mount for that, but I will consider other sized tubes.