In the field of fantastic fiction, the question of world-building is not uncontroversial. But I grew up with 'Dungeons and Dragons,' so that whole world-building thing is very close to my heart.
The so-called "secondary market" has also always been something that I'm comfortable with. I'm not a dealer who turns his nose up at that part of the business. I'm an art dealer - my primary responsibility is to represent the artist.