I bet ZOS will eventually put the 2nd tier horses in the ESO-store.
The way I see it:
1) they will alter textures/models, but will keep the stables' price (42k) intact;
2) so far no price reduction, they may throw it in as a package (15$ as Palomino, but you get equivalents for all 3 horses);
3) they may add convert option, so you can magically change your existing horse's skin.
What do you think?