A set that cares about costs:
Wheelhouse - 1
Action
+1 Action
+$1
Reveal the top card of your deck. If it costs more than the combined cost of cards you have in play: +1 card.
Bad Village - 2
Action
+1 Card
+2 Actions
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As an additional cost to buy this, discard a victory card.
Barter Village - 2
Action
Choose one: +2 Cards; or +2 Actions.
Dumper - 2*
Action
+1 Card
+1 Action
+1 Buy
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This costs $2 more while being trashed.
Match Maker - 3
Action
+1 Action
Reveal a card from your hand, then reveal cards from the top of your deck until revealing one with the same cost in coins. Put that card into your hand and discard the rest.
Molder - 3
Action - Reaction
Trash 2 cards from your hand. If they have different costs: +1 Card, +1 Action.
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If you would gain a card, you may reveal this from your hand. If you do, gain that card putting it in your hand.
Inspector - 3*
Action - Attack
Each player (including you) reveals the top card of his deck and either discards or puts it back, your choice. For each card revealed, if its an...
Action, +1 Action.
Treasure, +$1
Victory, +1 Card.
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This costs $1 more for each other player in the game.
Panhandler - 4
Action - Attack
+$2
Each other player reveals the top 2 cards of his deck and discards each costing more than $0. If he discarded exactly 1 card, he gains a Copper. If he discarded exactly 2 cards, he gains a curse.
Sifter - 4
Action
You may trash a treasure card from your hand. If you do, cards cost $ less this turn equal to the $ that card could have produced.
Urban Village - 4
Action
+1 Card
+2 Actions
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When you buy this, trash a card from your hand. If it's an...
Action, put this on top of your deck.
Treasure, +1 coin token.
Victory, +1 VP token.
Sanctuary - 4
Action
Trash any number of differently costed cards from your hand. +$1 per card trashed.
Orchard - 4
Victory
Worth VP equal to the most common cost in coins among cards in your deck. If two or more costs are tied for most common, use the highest cost.
Stockroom - 4*
Action
+1 Card
+1 Action
Discard any number of cards. +1 Card per card discarded.
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As you buy this, you may gain up to 2 coppers. This costs $2 less per copper gained.
Factory - 4
Action
Choose one - Gain a card costing up to $4; or gain 2 cards with combined costs equaling up to $5.
Scam Artist - 5
Action - Attack
+1 Action
Each player (including you) trashes a card from his or her hand. You gain a card costing exactly $1 more than your trashed card, putting it into your hand. Each other player gains a card costing exactly $1 less than his or her trashed card, putting it into his or her hand.
Hanging Gardens - 5
Victory
Worth 1 VP for every 3 cards in your deck costing $5 or more.
Metropolis - 5
Action
+2 Cards
+2 Actions
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As an additional cost to buy this, discard 2 cards.
Ravager - 5
Action - Attack
+3 Cards
Each other player with 5 or more cards in hand reveals his hand and discards the highest costing card from it.
Dividends - 7
Treasure
When you play this, its worth $1 per different cost among cards you have in play.
Groves - 7
Victory
Worth 4VP
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Rather than buy this, you may trash any number of cards from your hand with total costs exactly equal to this card's cost.