Definitely your status as being known, well known, and your reputation for producucing quality animals will play into your success. Also, anything that is 100% het pied will have a better chance of being sold, or traded for. Especially if you have photo documentation of the parents locked, offer a guarantee, and consider paperwork or certificate of guarantee. These things will be important to some potential customers. I think almost anything with piebald in it is attractive to quite a few people.