I have to admit that yellow Grand-Velo was the nicest Bridgestone that I have seen on ebay but I don't think it was worth $2,000. As far as vintage mountain bikes you can't beat a Tange Prestige MB-1. I have a MB-6 and I love that frame. I would love to get an MB-1 but I think the prices they go for might be a bit too much. Bridgestone has a great reputation. I think people get caught up in the reputation and end up over paying for them on ebay.
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Grand-Velo that went for $250 on ebay. It was a whole bike and considering the components that came with it it was a pretty good deal.