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GlennList as a "Complete your 1977 Topps set" lot. Allow the winning bidder to choose the 50 (or other x) cards he or she wants from your full list. Do that a few times, then sell the rest off in a single lot. You're going to make very little money on these anyway, as I discovered after opening about 40 wax packs from the 70s, but you'll make a bit more if the winner has more choice.