A Pentax 645, built like a outdoor dunny, and 6x4.5. Also takes 220 film. But very loud winding. Beaut lenses. I love using mine, one very serious piece of camera with 6 AA batteries in the handle. Really beaut ergonomics, and as used by police forces around the world, in their time.
Next cheapest a cheap folder eg Bessa by Voitlander; fun to use, and something old world nice 6x9 negs. But top of the range with Heliar lens can cost well over US$1,000. Try the cheaper vaskar lens, no light meter, all manual, focus by distance scale. Say US$50-120. Took mine down to the Antarctica, and froze it in the fridge freezer for three hours to make sure it worked in the cold. Even the 1 sec was working at freezer temperatures...amazing.
Then the Yashica twin lens is a fantastic camera. The system has telephotos, macrolenses filters, hoods, and mine has 35mm adapter kit as well. 'Course these are Rollieflex copies. The advantage of the Yashica is looking down into waist level composing screen. This upsets fewer people than a camera at eyelevel poked in their faces.
There's plenty of choice, but all said and done, and with 20/20 hindsight, I'd be finding a little more dough and investing in a superb old folder with rangefinder. But the trouble with the old folders is their tiny little peepholes...very difficult for good composition.