Guncannon (GQ).

What moves the price of this card

The Guncannon (GQ) on this page is the Normal printing from Dual Impact, and it trades at $0.06 in near mint condition. The same name is on 8 other printings: Edition Beta GD01-004 at $883.33, Phantom Aria GD04-009 at $2.48, Starter Deck 01: Heroic Beginnings ST01-003 at $1.46, Edition Beta T-002 at $1.33, Edition Beta GD01-004 at $0.97, Starter Deck 01: Heroic Beginnings T-002 at $0.53, Newtype Rising GD01-004 at $0.35, Deck Build Box Freedom Ascension GD01-004 at $0.15, 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.