I think that the pastel price will plateau where it is now, pretty much. I don't see it going much lower, though it's been lowballed a lot, I don't see how pastel breeders can let their snakes go for the price of normals..
A lot of people have Spiders now.. in one to three years, I see a lot of them will be on the market. But people as always, who are serious, will pay for quality, so if you plan on making any money, your snakes and your reputation are going to have to stand out from the crowd! Building a rapport with people (on thie or another forum, etc) would be a great way to build trust.