I have a friend who insists she needs to sell one of her Dad's guns. (He's been gone for several years.) I and all of her family are trying to convince her not to sell it ... figure out something else. But, she says she's got to. He bought it brand new. It's a Marlin 336 in .30-30, the 100-year anniversary model, made in 1970. It's probably been fired less than twenty rounds; I feel sure it's shot less than forty. He was a .30-06 man, so I don't know why he even bought it. He put a Leupold Vari-X II on it; a 1-4x20. I would say it's in very good condition. It has one prominent scratch on the butt stock (visible in pics), and one spot of corrosion on top of the barrel (pic didn't come out well). What do you think is reasonable value? Thanks!