Whenever a commander you control enters the battlefield or attacks, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Near Mint - $5.00
Lightly Played - $4.75
Moderately Played - $4.00
Heavily Played - $3.00
Damaged - $2.50
Near Mint Non-English - $5.00
Lightly Played Non-English - $4.75
Moderately Played Non-English - $4.00
Heavily Played Non-English - $3.00
Damaged Non-English - $2.50