I got my 2020 (new) in December of 2020 for about $1500 under sticker ($64K, MSRP was $65,480). I'm thinking the Christmas Season and COVID helped with the deal I got. There was initially a $4k ADM on the car. Just looking on line, it looks like the few GT350's that are left in dealer stock have...
Congrats! I picked my '20 last Saturday, dealership to my garage. Letting her sleep until spring. This is my third Mustang, I had a '69 Mach 1 and an '88 GT. Last pic is my Mach 1 at New Dragway back in '87