Fortress Defense (Championship Participation Pack 01).

What moves the price of this card

The Fortress Defense (Championship Participation Pack 01) on this page is the Holofoil printing from Gundam Promotional Cards, and it trades at $29.80 in near mint condition. The same name is on one other printing: Newtype Rising GD01-106 at $0.61, 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.