Of course, most of the cookbooks mentioned are not ones that would be on my shelf. I also think that "vintage" is in the eye of the beholder, as most of the cookbooks mentioned here are faddish. However, many older cookbooks have great recipes, so I need to start browsing my shelves more often.
I suspect most of my cookbooks fall more into the 'useful' category than the 'collectible' category, but it is nice to think there might be a demand for a few of them when I'm gone.