I don't know for sure how valuable Dura-Ace 1st Gen (later called 7100, AFAIK) is. I don't keep up with Dura-Ace really, I was simply speculating that old DA stuff is likely to be in much shorter supply than the 7200-7400 series stuff, and therefore collectible. It ain't Campagnolo or Stronglight, fer shure, but it's probably rarer. Sorry if I've misled.