It all depends on where you think the economy is going to go. If a sharp recovery is on the way and you wait till the recovery occurs your to late buying in. If you think the economy will drag along for years like it is then probably buying into snakes as a short term investment is not the way to go.
I see a lot of it has to do with the fact that they are line breeding those morphs today right along with other breeders. By the time a morph drops to a couple thousand dollars in cost it is being line bred to every female 10 or 15 breeders have in their collection. That definately drops the price a lot quicker than the days when a lot of breeders didn't have 100 females up and ready to breed in a given year.