Why are females more expensive?

[mainbutter]

But, for 99.9% of the mutations that are out there, everyone wants the girls ... I wish it wasn't true, cause I'd love to keep all my girls, but sadly it's not.

-adam

I'm more interested in female normies right now than anything else I think if in a few years I get into breeding, I'll probably get a pair of unrelated male of some morph(probably a co-dom of some sort) to breed to some female normies, simply because it's more cost efficient to get started at least getting a decent number of clutches.