I have one RBJ1, but it's not for sale. I use to have two then sold one, and regret it to this day. I seriously can't believe how I got my hands on these things when I was a kid.
I had to save up my lunch money for like a month before I could buy a used primo pro cassette, used spokes and used RBJ1(still looked decent with all the japan stickers and all). Then I had to save another week so i can get a bike shop to lace it for me. As you can imagine, they had a nightmare putting together a used wheel, but they got it done nicely.