Crones' Ledger $4
Action - Attack
When you buy this each other player may not spend coin tokens on their next turn.
Choose one -
Each other player gains a curse and a coin token
or
Each other player loses a coin token and you gain a number of coin tokens equal to those lost in this way.
Credit Slip $4
Treasure
Whenever you buy a card you may discard this from your hand to gain 2 coin tokens.
When you play this it's worth $1 for every 2 coin tokens you control up to a maximum of $6.
I can gain Province trashing Gold with Butcher even if you bought Crones' Ledger on your last turn, right? Only 1 turn if you bought 2? Not applied to Outpost turn, right?
Credit Ship should have Reaction type. And too strong. It is like Merchant Guild. Both earns $2 when you bought 1 card, but Merchant Guild doesn't give you 2 coin tokens. And after discarding, Credit Ship earns more than Platinum. Overpowering, even considering it doesn't earn any $ when discarded. I think up to $3 or $4 works.