Another thing worth mention. Theres barely any people who are breeders for a career. And to answer your questions you cant find a pair for $350 if thats what you mean. You might be able to find a good pastel female for 200-300, and a male spider for 200-300. And those are 09's. Like the others said a female that is mature costs alot more money at least $500. There is no way you would be able to breed in 2010 just because as far as we can tell you know nothing about breeding and cant afford to buy the snakes, and even if you could they would be to young to breed. Plus you need somewhere to keep each of them plus their babies. Heating for all, and a thermostat and rack/tubs or tanks. And for selling the babies, it depends what you get????
The best place to sell them is a reptile show or kingsnake.
Also forgot to mention you need an incubator, buy one, or to make your own with a heating element and a good thermostat. And time.