The breeders you referenced have a track record. I think when people purchase a snake they want the peace of mind that comes with knowing the breeder has been doing it for some time. Call that reputation or something else but knowing that the person you are dealing with will be there next year is important.
I by no means think that it's something against you or your snakes but rather a lack of experience(time) in the market place.
It takes time to build a clientèle which is then spread by word of mouth which in turns creates new customers.
I think it's a time issue.
I'm sure Scott, Don, Jeff, and Shannon( and the others) could tell us about the early days when they were just getting started and much would be the same.
I know I have very little track record as a breeder but still I try. I'd love to make some money but don't really care at this point. I have a hard time letting any of my kids go.
I'd rather keep them all to myself and enjoy their company.
I do feel good that some of my snakes are in UT, NY, TX, CO, MO, IA, NE. Still plenty of States to go but I'm not in a rush.
"Resistance is futile, all the States will be assimilated"

Just my thoughts on the matter.