Keep your eyes on eBay and check the
iBob for sale listings. They're not that hard to find. I'm currently advertising an RB-2 on CL, but because I completely reconditioned it, I'm not offering it at a bargain price (I think it's listed somewhere on that iBob list). My RB-2 is a 1988, and something I've noticed about it and other Bridgestone RBs at least is that the paint does not hold up very well. I'm not sure if it's something specific to a few years, or if it is common on most of their models.
By the way, there is a
Gran Velo on eBay: $1999 starting bid, $2999 Buy in Now price!