Neither player can Summon more than two times per turn. (Negated Summons count toward this limit. Negated cards/effects that would Summon do not count.)
Near Mint Unlimited - $0.25
Lightly Played Unlimited - $0.20
Moderately Played Unlimited - $0.17
Heavily Played Unlimited - $0.15
Damaged Unlimited - $0.13