Some lots with high volume give decent discounts, from what the sales manager told me if they don't sell enough, they don't get many when the next year models come out.
So basically they request 20 and only sell 2 = they can only get up to 2 for the next model year. That's what he said, I am not a car salesman so I am not sure how true that is, and it was specific for Ford Performance/SVT vehicles not the standard Ford vehicles.
I got mine at Ken Grody Ford in Buena Park, CA for $4000 under MSRP, fully loaded 802a only missing the Recaro seats.
Edit: I forgot to mention, I was looking about 9 months previous and all of the 2019's were $10k over MSRP, I waited until the 2020's were being sold and the dealer was trying to move out the 19's to get the 20's in inventory. So the waiting game worked out for me!