Exactly... there has to be a demand for someone to buy something. There are full bodys(not low poly sim-type but hi-res enough that you could use it in films and seem like real people) that are fully animated on that site for the same prices as the retail sims snowflake mesh
Even if someone were looking for low-poly meshes to use in games, the only game that can get away with things like fancy hairs, home appliances, etc. is The Sims. She would have better luck selling meshes of machine guns, swords, zombis, etc.