I'm assuming they are coming for a reputable breeder so you are sure they are 100% hets. The het pied female will be ready to breed sooner than the pastel het clown but which do you want to work with? Which project excites you more, the prospect of hatching a pastel clown or hatching a pied? Do you have a male het/visual for either of them? Prices do constantly shift, but if you are only breeding for money then to me personally you are breeding for the wrong reasons. I got my leos because I thought I wanted to work with them, but they don't excite me as much as my cresties or my ball pythons so they are more of a pain than anything else. You have to enjoy what you are working with or you may become bored with it. Get which ever one you will enjoy working with more regardless of where you think the market will be in a few years.