There are a lot of them on the big auction site. Also check pawnshops and gun shows, if you have any in your area. Sometimes they come up for sale here too, in the classifieds.
When I was still collecting guns, I would buy every Leupold 4 or 6 power scope I found, if it was in excellent condition. I don't think I ever paid more than about 60 for one
What?! That's crazy. I would prefer a variable power, but could easily be swayed to a fixed if the price was right. I'll try to keep my eyes out..and if you happen to see one let me know lol (cause I dont see any pawn shops around here and rarely hear about a gun show)