Toyota is currently offering two incentives cash back Base & advanced $4650 0% Interest for up to 60 months Link below is to an article on Toyota's marketing strategy for the PIP. Toyota Motivated to Match 2012 Prius Plug-In Sales; Defends Discounting | Sales & Marketing content from WardsAuto
In the NJ dealer that I bought mine from, they are doing $4,650 discount on Base and $6,500 for the Advanced model. 2012 models (if you can still find them) get 0% interest. 2013 have 1.8%, I think with the same discounts.