Ed, you just have to get in with a small town dealer some where.
We ordered our 13 GT500 and got it under MSRP (-$1500) through a small dealership in Iowa when all the dealers in KC where 10k over.
Jeff, last GT500 I saw in a dealership was in a small farming town in the middle of California. '13 (maybe a '14?) coupe, I don't recall the markup but it was definitely not MSRP.