Luck Mechanic (almost sounds like a class)

Odd number dice
   Availability
   Math
   Color, shape, size, medium
   Marketable?

 Gems
   Availability
   Math
   Color, shape, size, medium
   Marketable?

"Normal" 7 piece 20 sided set
   Availability
   Math
   Color, shape, size, medium
   Marketable?

Coins
   Availability
   Math
   Color, shape, size, medium
   Marketable?