Thanatos wrote: Among the anime/manga fans, cels collectors are very marginal, compared to figures collectors for example. It's not a very well-known sector (or I don't think so to be exact) and it's very costly.
I would agree heartily to the first. I went to AnimeNext for three years, presenting regularly on cel collecting, before meeting even one other collector (besides Starfighter, whom I roped into presenting with me). It does seem to be a very fringy area of interest. I'd guess, however, that there is a somewhat larger circle of American animation art collectors, especially of Disney and classic Warner Brothers art. Part of this is reflected by the greater number of online sites offering such art, and the relatively higher prices it commands.
I'd differ on the last point. Compared to high-end resin-cast figures, animation art is not very costly, at least not for most series or movies. That is one of the things that attracted me and kept me in the field. Why should I pay perhaps a hundred dollars or more for one of a couple hundred (for a limited edition) examples of a plastic image of a character or mecha, when for the same money I could get "the" image that was actually used to make a critical episode of a series or movie I admire?
For what it's worth, about a year ago I did a bean-count of Beta participants. At that time, 970 persons had registered on the site from its origins in 2002 to 2011, and during a given ten-day period I found that 108 members visited the site at least once. Considering that many people who registered visited only once before deciding that it was not their bag, that was a pretty healthy ratio. Still, it suggests that the total number of animation art collectors, lurkers, hoarders, souvenir-buyers, as well as hard-bitten enthusiasts like ourselves is probably numbered in the low thousands rather than the millions.
Which is nice when a really nice item is up FA and I'm patiently auction-sitting and counting down the seconds before unloading my bid.