Every printing we track, with today's reference value. Cards someone is selling show the lowest price.
10 cards

Polymerization
Advanced Demo Deck Extra Pack #DEM4-EN001

Galaxy Serpent
Advanced Demo Deck Extra Pack #DEM4-EN002

Flash Knight
Advanced Demo Deck Extra Pack #DEM4-EN003

Lancephorhynchus
Advanced Demo Deck Extra Pack #DEM4-EN004

Mandragon
Advanced Demo Deck Extra Pack #DEM4-EN005

Foucault's Cannon
Advanced Demo Deck Extra Pack #DEM4-EN006

First of the Dragons
Advanced Demo Deck Extra Pack #DEM4-EN007

Gaia Knight, the Force of Earth
Advanced Demo Deck Extra Pack #DEM4-EN008

Gem-Knight Pearl
Advanced Demo Deck Extra Pack #DEM4-EN009

Link Spider
Advanced Demo Deck Extra Pack #DEM4-EN010