I paid $1500 on ebay for the 3 Bayamon roulettes (all blank on one side).

However, I consider the Casino de Puerto Rico (circa 1923) chips to be my most valuable chips. To my knowledge, the yellow and red are the only 2 known. USPC records show that the CPR came in at least 5 colors. Although the Bayamon chips have a picture, for some reason, I like the look of the CPRs more.