As usual, Jim's right. A9's have a cult following and seem to be hard to come by these days. Stronglight still makes this model. The new ones look the same, but don't have roller bearings, which is the main reason the old ones were so popular. I auctioned a similar Stronglight Delta HS a couple years ago and, surprisingly, it went for almost $100. It was NOS though.

Start it at $40. You'll get that and more.