I think there are a lot of hybrid collector/users out there. I generally think of myself as a user because I use my lenses and I'm not so concerned about museum-grade condition, but I've got more lenses than I use on a regular basis. The same is probably true of a lot of people buying vintage lenses. Shooting wet plate has been my downfall, since I don't like the look of modern lenses with the process. Factor in the lenses needed to shoot different size plates and things start to multiply.