I sold all my digital kit apart from a Sony RX100 and bought a mint Leica M6 TTL with a 50mm Summilux.
Apart from being a magnificent piece of engineering, it has improved my photography immensely. Shooting full manual on films like Velvia which are incredibly intolerant of poor exposure forces you to learn how to take a photograph properly.
As a plus side, the camera is fully mechanical, 90's vintage, the lens 70's, and still one of the best ever made. It's never going to drop in value.