Yesterday I bought a Leica camera for well under £200. It's an MDa, so between 40 and 45 years old, no viewfinder and takes M mount lenses. They were originally built as scientific and technical cameras.
Image from Wiki...ia
It came with a beautiful Leitz 3.5cm clip on viewfinder - as seen here on an M3 - which is lovely to look through
Tonight I took an hour's perambulation with the camera, having attached my Zeiss 25 and matching viewfinder and enjoyed shooting a roll of HP5, sunny16 (adjusted) style and scale/zone focusing. The camera is really smooth and a joy to use and has already given me more fun than any smartphone.
Save your money, buy an MDa;)
Mike