Rose hairs, Curly hairs (Genic) & Chaco (Golden Knee) are supposed to be the three ideal starter species. I have all three, but only have a half-grown Curly hair & some small Chacos available for sale.
I haven't put them on the site yet, but I suppose I ought to do that here soon if I ever expect to sell them.
I also have some young Indian Ornamentals, which are a gorgeous arboreal species, but they kind of creep me out with how fast they are!