As far as I know, with Chrysler in the past, as long as you get the paperwork done and put some form of a down payment, even insignificant amount like $10, you can keep any incentives for the month you are purchasing in. If incentives are BETTER when the car is being delivered to you, then you can request the latest and greatest incentives. They do, at times, have special incentives for you to buy from existing stock but it is very clearly outlined.