Helmeppo.

What moves the price of this card

The Helmeppo on this page is the Normal printing from Legacy of the Master Release Event Cards, and it trades at $0.58 in near mint condition. The same name is on 8 other printings: A Fist of Divine Speed OP11-092 at $5.12, One Piece Promotion Cards OP03-091 at $3.08, Premium Booster -The Best- ST06-010 at $2.39, One Piece Promotion Cards ST06-010 at $2.18, Carrying On His Will: 3rd Anniversary Tournament Cards OP13-036 at $1.35, Paramount War Pre-Release Cards OP02-113 at $0.99, Pillars of Strength Pre-Release Cards OP03-091 at $0.79, A Fist of Divine Speed OP11-092 at $0.37, so read the set, the number and the rarity together before comparing prices.

Condition does most of the work below the surface. A copy with soft corners or a print line off centre trades well under the market price shown here, and a copy clean enough to grade trades well above it. Before you value your own copy, look at the corners under a light and check the centring on the back, where most cards give themselves away.