How about this Peddler/Junk Dealer variant ?
Recycle - Action - $5
+1 Card
+1 Action
You may trash a card from the kingdom. If you do +$1
Usually it's just a £5 peddler, which is pretty lame. In most kingdoms it's just going to trash coppers and curses and the trashing part will make almost no difference. IN the kingdoms where it does matter (Fortress, a few other trashing type kingdoms, any kingdom where you can get ahead enough that starting to trash provinces /colonies to speed up the endgame is beneficial) it seems likely to be pretty strong. SO early in the game, pretty expensive for what it is (Bazaar is the same price, Tournament costs one less and comes with a bigger benefit), late in the game and in certain kingdoms, very cheap.
Basically very situational at best. Its interaction with things like Trade Route would also need to be clarified.
Trashing from the supply generally seems to be a tough concept to make work, because it most cases it's doing something which doesn't directly benefit the person playing the card - it's likely either to have a similar benefit for everyone, or not to benefit anyone.
It's probably worth a playtest, but I'm not convinced.