Gallering
A person who knows how to sell art and also how to make it look good in a gallery. They're like a combo of a dealer and a decorator.
The gallerator sold a painting for $10,000 and made it look like a million.
He was a gallerator and could make a bad painting look like it was from the Louvre.
She was a gallerator and knew how to make art look good and sell it fast.