I'm selling my dad's duplicates for him, so that he can complete some sets instead of having a couple thousand duplicates. I'm starting with 1972, because he has 1,100 dupes from that set (not a typo). I'm selling the high numbers and some of the stars individually, but I'm planning on selling various starter sets to move the commons.
I don't have much experience with large vintage lots, so I'm wondering how I'd determine the prices. I'm thinking that maybe I'd add up the most valuable cards, and then do a set price for the rest of the cards. But I'm not sure what that price would be. Maybe 40-50 cents for VG-EX cards? That might be a little too high for selling a large lot (like 400 cards).
I'd appreciate any advice. Also, if anyone is interested in them, they are also available for trade (in return for vintage).