I bought a RB-Pro S for $450 in awesome mechanical condition and relatively good aesthetic condition. Only issue it's ever had is that the back occasionally does't recognize that an exposure has been made, and I have to stop, put the darkslide in, release the shutter, and it usually rights itself. This has led to maybe 1 accidental blank frame every 3-4 rolls. I realize I might have paid a little much, but I immediately fell in love with it.