Look for a Bronica ETR series camera with a 35W back. It is a 35mm panaramica back. Depending on the coverage a 40 or 50 mm lens. Depending on shooting style, a WLF or a prism finder and a handheld meter or a metered prism. No cropping needed. With some shopping around you are under the $300 mark and have an entry into expanding into MF as well as the basis of a very good 35mm system.