:D Honestly, with ball pythons, it all comes down to what you can make of the morph. The original ones bought are worth tons--because of the combos you can make with them and their natural beauty.
I know the guy who found the Leopard ball python
Looks like a normal right? Just a little wonky?
This is a lesser, another morph (My favorite other than clown!)
When bred together the snakes make this:
or this is a "Kingpin" (a lesser/pinstripe)
Bred with the leopard makes the ocelot (a 3 gene animal!)
So people buy them for their gorgeous looks(they look GREAT already) and for creating a lot of variety in morphs