Right now across the board most of Nvidias cards are on sale now. The reason for now is because all the manufacturers have to make room for the new Kepler. Out with the old in with the new.
I really don't think that you will see much more of a price drop then what it is now. But 216 dollars for a 560 ti 448 wow at that price I would by two of them. Because they are not making that card anymore.
Go for it, it is a very nice card to OC it and it could run faster than a 570 when OC'd. If I had the money I would get it myself. Good luck to ya on a buy that great.