Most played cards in Goblin Bidding:

2 Decks
Goblin Warchief
8 copies - 4 average
Sulfurous Springs
8 copies - 4 average
Skirk Prospector
8 copies - 4 average
Goblin Ringleader
8 copies - 4 average
Goblin Piledriver
8 copies - 4 average
Bloodstained Mire
8 copies - 4 average
Cabal Therapy
8 copies - 4 average
Goblin Matron
8 copies - 4 average
Rishadan Port
7 copies - 3.5 average
Mogg Fanatic
6 copies - 3 average
Cranial Extraction
6 copies - 3 average
Chrome Mox
5 copies - 2.5 average
Living Death
4 copies - 2 average
Burning Wish
4 copies - 2 average
Aether Vial
4 copies - 2 average
Duress
3 copies - 1.5 average
Gempalm Incinerator
3 copies - 1.5 average
Pyrostatic Pillar
3 copies - 1.5 average
Flametongue Kavu
3 copies - 1.5 average
Sword of Fire and Ice
2 copies - 1 average