Originally posted by millsware The remaining supply of "I found this in my grandfather's attic" might remain steady for a while, but not forever.
Forever is a very long time. There were millions upon millions of rangefinder and SLR film cameras made. For instance, about 8,000,000
Yashica Electro's over about 15 years - just that one camera body. It was the first AE camera! Sure, lots of old mechanical cameras have simply been thrown away. I retrieved my father's Argus C3 from the trash pile when he passed away in 2007. I'd guess anything bought is the 50's is very unlikely to be in the possession of its original owner now. In ten years we'll say that of cameras bought in the 60's. In ten more we'll say that of cameras bought in the 70's and that will be about the end of the 'Original Owner' fully mechanical film SLR's. Ten more years will finish out the AE-type as well.
In thirty years there won't be any more people living who bought manual focus SLR's when they were new. Of the - let's just guess 50,000,000, 10,000,000 of them Pentax, to be conservative - mechanical and AE film SLR's made from 1960 - 1989, how many will be left, and what will be the demand for those that are left?
And if Pentax made brand new (affordable) film cameras today, how many of them would still be working or repairable, using the assumed current technology (lots of plastic parts) in the same thirty years?
I'm betting on more of the classic film cameras to still be around in thirty years.