The most valuable PURPLE Monkey.D.Luffy card is Luffy-Tarou #5, worth about $297.49 in Near Mint condition, followed by Zoro-Juurou #4 at $239.78 and Uso-Hachi #1 at $106.93. These are raw (ungraded) market prices from recent sales, updated daily. Graded copies sell for more; each card's page has its PSA, CGC and BGS prices.