I have two of these, purchased with a bunch of other scopes at an estate sale. One new in box, the other used but in very good condition, also in box. The used sight also comes with rings that fit Picatinny/Weaver type bases.
They're meant for mounting on rifles or shotguns, and have 34mm tubes so finding rings is relatively easy. The dot is 2 MOA.
Asking $525 for the new one, and $325 for the used one--both of which include priority mail shipping and insurance in the U.S. Will take personal check, USPS money order, cash or PayPal.