My wife got 5700 off MSRP on an MKC AWD Select in February. That included incentives. She wanted to negotiate the deal herself (and I think she did a decent job).
We would have waited to buy knowing that the longer we waited the better we could negotiate the price, but what she wanted was nearly impossible to find. She absolutely did not want a panoramic roof which ruled out the Reserve package and she did not want a 2.3L engine. The only upgrade that she wanted was the Select Plus package (which was already given to the buyers/dealers free from Lincoln on the window sticker) and the power liftgate; she also wanted the mats but they could be ordered separately. In the end, we did find a white on white, AWD Select with a power liftgate, but it also came with the climate package. Due to lack of inventory for what she wanted and knowing that 2015 production would be ending soon, she decided to go ahead a buy.
Remember that dealerships will lower the price depending on inventory, how long the car you're interested in has been on the lot, whether or not they need to meet some sales goal, whether or not you have a trade-in that they can low-ball you on, etc. They will also lower the price on the front end (the negotiated price) in the hopes that they might be able to make up some of "the loss" on the back end (the finance manager's office - financing, gap insurance, extended warranties, detailing packages, etc.).
If they thought my wife was going to give them something on the back end, they were unpleasantly surprised.