How about ruined treasures?
Failed Venture
Treasure/Ruins - $0
Worth $1
Reveal the top card of your deck. If it is a Treasure, play it. Otherwise discard it.
Worthless Contraband
Treasure/Ruins - $0
Worth $0
+1 Buy
When you play this, the player to your left names 3 cards. You may only buy those cards.
Bad Loan
Treasure/Ruins - $0
Worth $0
When you play this, reveal cards from your deck until you find a treasure. Trash it.
Really Ill-Gotten Gains
Treasure/Ruins - $0
Worth $0
When you play this, gain a Copper.
__________________________
When you gain this, gain a Ruin.
Shady Bank
Treasure/Ruins - $0
Worth $0 for each Treasure in play, counting this one.
Abandoned Quarry
Treasure/Ruins - $0
Worth $0
While this is in play, Action cards cost $1 less, but not less than zero.
Complete Moron's Gold
Treasure/Ruins/Reaction - $0
The first Complete Moron's Gold you play is worth $0. Each additional CMG is worth $1.
___________________
When another player buys a Province, you may reveal this from your hand and trash it.
Sleazy Brothel
Treasure/Ruins/Victory - $0
Worth $0
Worth 0 VP
Empty Cache
Treasure/Ruins - $0
Worth $1
________________
When you gain this, gain 3 Coppers.