Either player can pay 800 Life Points to negate the Special Summon of a monster(s), and/or an effect that Special Summons a monster(s) and destroy those cards.
Near Mint Unlimited - $20.30
Lightly Played Unlimited - $18.30
Moderately Played Unlimited - $14.20
Heavily Played Unlimited - $10.20
Damaged Unlimited - $8.20