As Six-y Beast enters the battlefield, you secretly put six or fewer +1/+1 counters on it, then an opponent guesses the number of counters. If that player guesses right, sacrifice Six-y Beast after it enters the battlefield.
Near Mint - $0.30
Lightly Played - $0.30
Played - $0.30
Heavily Played - $0.20
Damaged - $0.20
Near Mint Non-English - $0.30
Lightly Played Non-English - $0.30
Played Non-English - $0.30
Heavily Played Non-English - $0.20
Damaged Non-English - $0.20
Foil Prices
Near Mint Foil - $1.90
Lightly Played Foil - $1.70
Played Foil - $1.30
Heavily Played Foil - $1.10
Damaged Foil - $1.00
Near Mint Foil Non-English - $1.90
Lightly Played Foil Non-English - $1.70
Played Foil Non-English - $1.30
Heavily Played Foil Non-English - $1.10
Damaged Foil Non-English - $1.00