There's about $3500 between sticker and invoice, so you ought to be able to at least split that difference 50/50 right off the bat. Maybe you can do better depending on how many are sitting around in stock (or, worse if they're selling well). It isn't so much a matter of where in the country you're located; it's a factor of how well the inventory is turning over in your area.
There's also a choice of $800 cash rebate or discounted financing through 8/31.
Go to Edmunds (
http://www.edmunds.com) for more pricing and details.
On the trade, get trade-in estimates from both Edmunds and Kelley Blue Book (
http://www.kbb.com). I've found that Edmunds is usually too high and KBB is low, and an average of the two is very close to a real value of what your trade is worth.