My film camera bodies mean a lot to me, but I don't know how much they'll be worth down the road - I certainly didn't buy them for their investment value! On the other hand, I have some pretty spectacular lenses that became orphans when AF came to be. What I saw these lenses sell for really hit rock-bottom around 5 or 10 years ago. When these lenses were rediscovered by the crop-sensor digital crowd prices rose steeply, although were still a bargain compared to contemporary lenses.
The next big thing, I think, is going to be full-frame mirrorless digital bodies. The flange-to-sensor distances of these cameras will allow just about any SLR lens to be adapted without a crop-factor. With focus-peaking, in-body-image-stabilization and perhaps a few firmware features built into these cameras' programs, just about the last barriers for using legacy lenses on modern bodies are becoming moot.
Maybe we'll see the prices of some of the fine lenses from the past stabilize with some real value.