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R4-R7 buyers tips
The following www page by a Leica repairer gives an excellent summary of what to look for, and what traps to avoid, when buying a 2nd hand R4(s), R5, RE, R6(.2) & R7:
A note about possible broken links
This FAQ has over 900 external links. Over time it is inevitable some of them will break. If you are bothered by this, see this detailed topic elsewhere in the FAQ.