Most played cards in Shops:

1 Decks
Juggernaut
4 copies - 4 average
Mishra's Workshop
4 copies - 4 average
Copy Artifact
4 copies - 4 average
Icy Manipulator
4 copies - 4 average
Blue Elemental Blast
4 copies - 4 average
Mana Vault
4 copies - 4 average
Mishra's Factory
4 copies - 4 average
Counterspell
4 copies - 4 average
Control Magic
4 copies - 4 average
Triskelion
4 copies - 4 average
Su-Chi
4 copies - 4 average
Sage of Lat-Nam
4 copies - 4 average
Fellwar Stone
3 copies - 3 average
Diamond Valley
1 copies - 1 average
Amnesia
1 copies - 1 average
Relic Barrier
1 copies - 1 average
Volcanic Eruption
1 copies - 1 average
Tawnos's Coffin
1 copies - 1 average
Chaos Orb
1 copies - 1 average
Hurkyl's Recall
1 copies - 1 average