You're correct. We have a 16 RS on the lot we cant sell due to the fact the 17s are the same price and there isnt a rebate on either one so nobody wants the 16. Those cars dont have anywhere the demand that a raptor does.
I bought a 17 RS in April, traded in on a BMW M2 in July. I bought the Focus for $2300 off MSRP. My interest in the car was quickly waning and took the quick road out while I could. Rebates of some sort have to be coming to move these.