Ducky and Ivy were cats listed as needing new homes they weren't from a breeder just people giving them away. I think that is the same as getting one from a shelter.
Milo was from a proper breeder.
If there were Sphynx in shelters I would get them from there.
It's a little different when your dealing with a rare breed..
And a little different then getting them from a pet store especialy Petland.