For those of you who know the Chancellor/Stash combo, this is pretty much the same. Just get two Scavengers and three Stashes, and your good to go. Scavenge the Scavenger every time, play three Stashes, buy Province, put three Stashes on top of your deck when you shuffle.
To elaborate a bit, you should probably open Scavenger/Silver (double Scavenger on a Baker board). When you have $5 buy Stash, $4 Scavenger, otherwise Silver.
What does this combo have going for it? It very fast. Much faster than S
Chancellor/Stash. It can be completely set up by turn 6. Which means it can empty the Province pile by turn 14 . Of course that's with perfect shuffle luck, so it's usually a bit slower, but still fast. Discard attacks (other than Urchin) hinder it severely, but it's mostly resistant to other attacks. So in absence of discard attacks and an obviously better strategy, (very rare) I would do this combo every time it appears.
