Interesting question,

I have an adult Chocolate male and 2 females, Juvenile Spider male, 2 Granite females, Adult Mojave, and a reduced pattern odd ball normal ish. Say 1400 on a regular market less likely. But there is no way I'd sell them for that, their worth to me is very very high. To me they are not an investment and the 'value' is immaterial. I cannot see trying to invest in a snake unless you are planning on breeding.