"Out the door" prices really won't help you, because in addition to the way different cars are equipped, there is considerable variation in sales taxes among the various states, rebates that were available at the time of purchase, etc.
I paid 99% of invoice for my car. On a leftover 2012, you would certainly want to get the price down at least to invoice and ideally even lower -- NOT including the available rebates -- and with no BS "doc" fees or other profit-padders.
Allez Rouge brings up a good point.I don't mind going the used route either of price is good. I just wanted to have an idea of a good deal. I think 30 or below for a premium is great.