The irony is that a Used Mamiya 7 MF RF will be cheaper than a Leica M-# but you did say 35mm (the Mamiya does take 35mm but for panoramas only).
There's no mid grade RF it's cheap fixed lens or super pricey.
However the used resell price is pretty steady so you could just buy ok ebay and then if you don't like it sell it for the same price (or more). Research prices, check seller's feedback, ask questions and you'll get something good. Sell it later if you don't like it.
The Noteworthy Ones - Mamiya: 7 II, RZ67 Pro II / Canon: 1V, AE-1 / Kodak: No 1 Pocket Autographic, No 1A Pocket Autographic
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