You may be right about the winter package on the 2013, I don't see it listed under the "Options" tag on the window sticker; however, I believe the Ford website still lists it as an "optional" feature. Regarding the 17" alloys, the suggested retail price is 495 and the invoice is 442. Don't know much more than that.
These are the numbers I'm looking at:
Total Invoice: 24,805
So essentially, yes it's a price 400 below invoice before the rebate. I presume that is decent for a 2013 with virtually no miles?