Lost Coin Action,
+1 Card
+1 Action
+
Return this to the Supply.
---
The first time you buy a Lost Coin this turn, +1 Buy.
This functions similarly to a coin token. Got extra this turn? Buy this and you'll randomly have on one of your future turns. It's obviously weaker than a coin token because you can't choose which turn this shows up on.
Seems like a forced buy whenever you have a left over coin during the buy phase, since most decks except maybe a terminal draw big money deck with no action support can support a peddler easily.
I mean, that's kind of the point. This isn't a card that adds to the strategic depth of the game, it just changes it so that it's different. Think of it less as a card that you choose to buy, and think of it more like Alms. Alms doesn't make you make any decisions, or really change how the game is played much, it's just a small change to freshen things up and benefits all players equally. In games using Lost Coin, extra money isn't such a bad thing and +buy is extremely useful and that's it: Game slightly tweaked this instance.
Edit: Although, now that I think about it, I could make it like this:
Lost Coin Action,
+1 Card
+1 Action
+
Return this to the Supply.
---
The first time you buy a Lost Coin this turn, +1 Buy.
$2 is a little more difficult to acquire and sometimes there's actually a choice to be made. Unsure which version I like better.
Edit 2:
Or this:
Lost Coins Action,
+1 Card
+1 Action
+
Return this to the Supply.
---
The first time you buy a Lost Coins this turn, +1 Buy and gain another Lost Coins.
Now you have to spend $2, but you get two of them for +$1 each.