I have been dabbling with mf on and off for a couple of years using an old Agfa Isolette folder. Now I'm thinking to move up a step gearwise. There are many options as far as cameras go. My preferences: 6x6 (I like the square and already have a 6x6 carrier for my enlarger) SLR I have seen some cameras (these are complete with lens, back and viewfinder), a Hasselblad 500CM, a Bronica SQAi and a Mamiya RZ67 with 6x6 back. The thing is I have absolutely no idea what the second hand 'going rate' is for these cameras. What is a reasonable price? Also which is preferable? Are there any quirks or glitches I should look out for?