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 - $23.80
Lightly Played Unlimited - $22.60
Moderately Played Unlimited - $20.20
Heavily Played Unlimited - $17.80
Damaged Unlimited - $16.60