People who have run glass galleries and also ran exhibitions for glass artists, including a certain W Walker, and probably handled more of his work than anyone bar the artist and assistants, should perhaps not be making unfair bets Does the illegality of insider knowledge also cover the art trade.
It wasn't unfair, cos I didn't take him up on it, as I knew he was right!!
and he knew I knew he knew I knew... (thank you Beyond Our Ken...)
You've heard of Caveat Emptor.. this is Caveat Aleator