Too many. Oldest being a 1929 Leica 1, bought used, and the latest an M6 .85 bought new in 2000. The finder was no good till Sherry K. upgraded it to MP standards. Got a bunch of old Leica glass and some asph lenses bought new. Lenses mostly great but the original hood for my 35mm Summilux asph fell apart in days and the dealer replaced it.
Would I buy a digital Leica? Only if they get the price/reliability/depreciation under control. Joe