I don't know whether they repair them now -- the Leicaflexes, that is. They may still service the R cameras. Some time ago Don Goldberg replaced my SL2's prism, which had really obtrusive desilvering, with another prism he'd had resilvered. He performed other service also. He (or Sherry Krauter) may be your best best for servicing the Leica SLRs.
Sending a Leicaflex from Ohio to Germany , receiving it with most expensive courier service plus the hyper prices of Leica service. Costs 5 times the current price of a Leica SLR body. I think if they can replace lens elements , it would be a good investment for 2000 dollar lens but not suitable to any other hardware.
Can you please ask easier questions ? One Apug members request .
I actually don't have any Leica slrs yet, but I'm thinking of going that way and wondered if they'd be a good investment.
I would not consider any camera stuff a good investment unless you use it to produce income directly. If that is the case then I would want the most reliable problem free gear that money could buy. You may want to talk to one of the Leica repair specialist locally and see if they can shed some light on the issue.
Buying photography gear either film or digital as an an "investment" is what people tell themselves to rationalise their acquisitions to themselves and their significant others, if you need to get real World return on investing your cash, put it into something else.