I found a new combo that I haven't run across before today, while playing online. It goes something like this:
Thin down with any trasher until your deck consists of 2 King's Courts, 1 bishop, 1 terminal silver, and any other card. Once you have these 5 cards, play King, King, terminal silver, Bishop. This will net you $9, and trash the 5th card. You then buy a Province, and repeat. You will get 7 points per turn and, with decent trashing, empty the Provinces by turn 17-18 with ~60 points. If Provinces are being contested, you can buy golds instead and still get 6 points per turn.
Obviously, a discard attack will wreck this strategy. You can do the same thing with Colonies if there is a terminal gold (like treasurer) in the kingdom.