The only "vintage" unopened packs I have are some 1951 Topps cards, not exactly the sexiest items in the hobby. However, back in 1999, when I was working in wholesale, I came into possession of a large quantity of unopened Cleveland Browns (expansion team) cards that are still cluttering up my storage room. Hard to figure why there was so little interest in them twenty three years ago that I got them for zip, but hey, there might be a Tim Couch card lurking there.
