I've been thinking about purchasing one of these , but seems like there have been a lot for sale showing up lately. Are they not worth the price point? I know there is a similar thread about the NF . In NF's case, i can see it because of the amount of them sold, so there's bound to be some used for sale. I don't know the Kahles scopes are in the same discussion as far as the amount of scopes sold. I tried to find something in the threads on this site about the scope, but couldn't find much feed back. Thoughts? thanks