Mamiya 645 RB67 RZ67 C330 Test Review.
Check this Review out. May I proactively point out that this fellow basis his opinion on the first C series model that ever came out. And he admits that he has not tried the other models. He esentially disqualifies himself as few would agree with his views.
C3, C33, C330 and other twin-lens reflexes (old TLRs)
The TLRs have been around for many decades. I owned a C3 system and thought the lenses were the only medium format lenses I've ever used that were less than spectacular.
The TLRs are unique in that they have interchangeable lenses!
The TLRs are probably the best way to get a screaming deal for a full multi-lens medium format system.
23, Super 23 and Press Cameras (old)
These are from the 1960s. They were attempts to win the press market away from Graflex and Linhof and then Rollei They were poorly made and the optics were so-so. On the other hand, you can get a complete 6x7 or 6x9 cm (2x3" as referred to in the model number) camera and lens for a couple of hundred dollars. For this $195 you'll still have a camera capable of producing images far better technically than ANY 35mm or digital camera made today.
I had a standard 23 camera. The lens was pretty mediocre and the mechanical construction was second rate. By second rate I mean things fall off. Just look at a Rollei and a Mamiya of the same vintage and you'll see what I mean.\
These press cameras have interchangeable backs and lenses. The only catch is that I never found any dark slide for mine and as far as I know it's a hoax: you loose a frame every time you change anything.
Recommendations
If you want it, buy it. Mamiya is probably the most popular brand of camera used professionally for studio work.