You say that he is a carrier and not a parti...are you certain that he even carries the parti gene? You also said that his mommy has a lot of white (I did not see this,though). Does she come from parti lines? I guess I am lost as to why you are certain that he carries the piebald gene at all.
I agree with Sue on the pricing, but I would never advertise a puppy as a parti or parti carrier unless I was certain that they are. Even if I had two parents that were both carriers and they produced a puppy with a lot of white, I would never say that this baby was a carrier...I might say, there is a great possibility, but not 100%.
Ok, I rambled...hope I made sense. I am just confused as to how you are so certain that he is a carrier. By the way, he is cute but doesn't look like any parti carrier that I have ever seen.