So I really like double-Tactician decks, but of course they require cards with +$ on them otherwise you're going nowhere. Well I was playing a game where I wanted to go for such a deck, and the only virtual cash Actions were Pirate Ship and Mountebank. Salvager (technically also virtual cash I guess) and Upgrade were available for trashing, and I chose the more reliable and harmful Mountebanks for the cash. The village du jour was City, and the +2 card effect never mattered; may as well have been a normal Village.
Working with just Mountebanks for money you need 4 to buy a Province, so that's generally what I was working toward, but I didn't exactly figure out I should get 4 Mountebanks and stop playing Salvager; I bought a Gold near the end that just got Salvaged the next turn before figuring that out. Really this just dragged it out for my poor opponent, since I was playing multiple Mountebanks every turn...and then there's the real kicker: Ghost Ship. Every turn. He resigned once I bought my fourth Mountebank, and at the time he still technically had a lead of 5 points.
tl;dr: My double-Tactician deck used Mountebanks for cash, and I also was playing a Ghost Ship every turn, before the Mountebanks of course. My opponent resigned once I bought my fourth Mountebank.
Naturally you'd be wondering who would let me do all that without picking up a Ghost Ship or Mountebank for themselves...turns out it was the
Larry.
Game log.
[Edit]
I think just looking at the contents of my final deck does just as much to describe my opponent's pain as my whole post does...
[13 cards] 4 Cities, 4 Mountebanks, 2 Tacticians, 1 Ghost Ship, 1 Salvager, 1 Province