Ebay lately seems to be catering primarily to more of a mass market. The real customers for this sort of stuff are here in BF C&V, RoadBikeReview Retro forum, and Classic Rendezvous. I find the vintage section of Ebay cycling to be harder and harder to search effectively, with every "improvement" in the search functions.

If it's not on Ebay, that doesn't mean someone doesn't need it.