That makes no sense.
He cannot stand behind 66% hets because they could be normals. 66% het means there is a 2/3 chance of a het and a 1/3 chance it's a normal. Don't waste your time or money. You can get 100% hets for the same price or barely higher, and if you buy from a reputable breeder, then you KNOW they are het, not just "maybe they are but maybe they are not." You could spend 4 or 5 years raising and breeding these, only to find out they are nothing but expensive normals. Don't make that mistake.
The best way would be the one I took. I invested in a couple of 100% het females, and a low white pied male. I have two clutches on the ground right now, and I have a good shot at producing pieds. You can pick up a low white pied male for $300 or $400 and a couple of het females for probably $150-$200 each.
Gale