I was looking around the local pawn shops and found an older rifle in pretty rough shape but on top of it sat a Schmidt and Bender.. The scope seemed to be an older version, gloss black and did not have a model number. It had a stamp that said the magnification ( 2.5-10 I believe, may have been 2.5-12) then Schimdt Bender Germany. The knobs had the single dot in the center and was front focal plane. Scope was very clear but had a couple blemish marks. No pics of it unfortunately, but I was curious if these older scopes are still worth any money?