From my short experience with the local dealers getting invoice or 1% below is not that hard to accomplish, anything below that seems almost impossible. 5% would be sweet but I don't know of anyone inside Chrysler that can get me the discount. On the other hand I am not going to loose sleep over 200-300$. If the dealer is straightforward without attached usual BS then the small price difference is not so important to me.
We know that, we are talking about invoice and below prices which are not on the website.
I like using TrueCar.com to get an idea of what other people are buying them for. Currently they can get you one for about 9% off msrp but others have negotiated better to around 12% off. My dad used them once and it was really easy and free. If you don't have a good discount plan like USAA and alike and aren't a good negotiator then it's a great service to use.