With pieds, that's sort of down to personal preference as far as high, low or medium white go. I prefer mine to be at a medium, enough to show the color and pattern that exists and still register as something unique. Pieds are a recessive gene, and those tend to go a bit higher than a dom or co-dom single gene animal, but single gene pied are becoming much more common, which means their prices have gone down over the last couple years. In this case, personality, feeding response, current size, and whether or not she's proven out as a good breeder would influence the final price.