Scarcity and value are linked. Example: The Palms Casino issue 1000
commemorative chips on the Triple Crown winner Secretariat (1973). Amazon
lists those chips from $30 to $50 bucks. The chip signed by the owner,
Penny Chenery, as they say in the coin world make that chip "a key". And,
assuming she signed only one equats it to a Da Vinci in that category. Bob Denbow, R-7362.