Poromon
Beginning Observer · BT16-001 U
Printings4
BT01-03B · BT3-001 UENRelease Special Booster 1.5$0.09
BT-16 · BT16-001 UENBeginning Observer$0.12Viewing
BT-16 · BT16-001 UENBeginning Observer$0.56
BT-16_PR · BT16-001 UENBeginning Observer Pre-Release Cards$0.40
eBay
TCGplayer
Cardmarket