I love Dominion Prosperity, and understand all of the cards perfectly except for Peddler. Can anyone explain it to me? For some reason I just can't get it. Thanks!
Peddler is a market without the +Buy.
It would have been an unremarkable card if not for its unique price. The standard price is $8, which is the priciest action in the game, but you never really want to buy it at that cost. The below-the-line part reads:
This means that for every action you play in your turn, the price of Peddler goes down by $2 in the Buy phase, so if you played two Villages, for example, you can buy a Peddler for $4, which is a much more reasonable price for it.
Of course the more Actions you play in your turn the better it gets, and the more Buys you have the more free Peddlers you can get - if you play four or more actions, each additional buy is a free Peddler! Also note the phrasing
The icing on the cake is that fact that unlike Bridge, the price only goes down during the Buy phase, so you can Remodel a Peddler into a Province no matter how many actions you already played during your turn, since its price is always $8 during the Action phase.
As always, you can read more in this great Dominion Strategy guide.