Anyone point me in a direction where I could learn more about theses style scopes. I received 5 of these target style scopes when I bought a large collection of stuff a few years ago and now would like to sell them and some of the mounting bases that came with them. I've looked at ebay and know that they have some value, I just want to learn a bit about them before posting them for sale. I'd prefer not to do business on ebay. I definitely appreciate the collective knowledge of this site - Thanks Bill