I'm in the market for a RB67. criteria are working condition and relatively affordable price (if you have a beater RB that you'd like to sell off, I'm happy to help!).
Would be great to acquire 120 or 220 backs, polaroid back, some form of the 90mm, and 180mm... & whatever other interesting RB stuff you may have. if you have a kit you're parting with/slimming down, chances are I am interested!
Although I have done less buying/selling on here, I have a 100% feedback score on that auction site, and am around on other photo sites under the same name.