I just wanted to comment that Bob Ross's name and image is controlled not by his estate, but by his former business partners. There are a couple of good articles out there, but the tl/dr is that they stole the business from him as he was dying.
It sounds like the painting being offered for sale was in private hands, but I hate to see a price point like that being set while the vast majority of his work is owned by the people who screwed him and his family.