First off, check the Jeep website, they'll let you know what's available. My brother just bought a Liberty last week and the incentive had expired. My brother told the dealer if he wanted to make the sale, include the incentives-done deal, car sold.
Try this, I found it in money mag., go to truecar.com. Price your car and it will show you what the dealer pays and the price ranges. What is a good deal and what isn't.
It is legit. My brother took the info w/him when he went to the dealer.
Give it try.