My 1983 Bridgestone 400, which a friend found in the dump, which I rebuilt with other old parts was my favorite bike for a couple of years. It would be a poor man's Rivvy, if I were poor.
Then, about ten years ago I saw an article in a Rivendell Teader agout converting 700c or 27" bikes to 650B. My first converson was a Univega Nuevo Sport. Once someone stopped me and asked "Is that a Rivendell?"
Right now my favorite bike is a 1983 Trek 630, converted to 650B.
Had I not read the article about convering bikes to 650B, I might be riding a Rivvy now.
I also have a RB-T, but since I paid for it, it wasn't exactly a poor man's bike.