R's are a limited commodity. Every 350 won't be an R, you won't see an R at MSRP unless you have a connection or found a non mark up dealer first. I only know one dealer who will never sell above MSRP. His list is 12 deep beyond his guaranteed 1. Also note, the GT350 guarantee also doesn't guarantee a "R', just a GT350. There will be plenty of wine this fall, even if you order a GT350R, it will never be assigned a VIN until your dealer gets an allocation. Allocation is given out weekly 99% of the time. In some cases, even if you order, you will never see the car.
I'm still looking and at this point, I'm willing to do $10K ADM "locally" or, out of state if it included a Courtesy Delivery. $8K ADM if I have to retrieve it / have it shipped.