Regarding market price, that price sounds too low for even subadult female pied. Then again not everyone sell their stuff "market price", especially if the guy make his own animals. You're going to get only one female or you're getting group of ball python? I import and get morph ball python in lot, so of course I pay lower than the "market price" but never at an outrage below the market price though.

Good luck to you and please keep us posted how it go.