I don't know if that's the reason they haven't sold the paintings. I suspect the rights to the Bob Ross brand are worth a lot more than the paintings themselves

I don't know if that's the reason they haven't sold the paintings. I suspect the rights to the Bob Ross brand are worth a lot more than the paintings themselves. All the paintings in their possession probably aren't worth more than a few tens of millions. They probably bring in more revenue than that each year by letting Bob Ross appear in commercials and selling merchandise, and they don't have to deal with the shady world of art dealers to do that.