I have often wondered about this myself. I have an old bass player friend who used to collect Playboy magazines. I thought he was weird. Now I know he was thinking big. Have you seen the prices for some of these old 1960's Playboy magazines go for? He was the guy who turned me a collector. I have an odd-bogg of collectable things; books, music, TV Guides, magazines, etc.
Supposedly Buk earned some good money from the works he sent to these magazines. He liked how much they paid until the 1970's recession hit, then he wasn't getting paid so quickly and he became angry.
I have to go watch "Barfly" again to help me feel OK. The DVD's of Barfly are going for $50. I watch a free download I found on my PC.
All's well that ends well.