There will always be some minority interest, and the whole Lomography thing is doing a lot to keep film going - I don't understand it either, all I know is that I can sell any weird crappy plastic camera that has the Lomography logo on it, or looks like it should have, and probably make a profit... if I had a time machine and a limited supply of period cash I think the easiest way to get more would be to go back to the 1960s and buy a few dozen Diana toy cameras and sell them in the present day, use the profits to buy more old currency, etc.. MUCH more profitable than Leicas, I think.