Re: SRT available options?
Unclear whether you are saying the GPS is factory installed or dealer installed. I have an original 2005 brochure (and I bought my roadster new) and the only options were the A/S tires, two-tone seats (n/a only), GPS, and the autostick. All were factory options. I picked up the bras and air deflector after the fact - they were dealer add ons. So were the lighted sills, deflectors, humidor, and a bunch of other stuff that is no longer available. Fortunately I scored two sets of regular and one SRT6 luggage about two years ago in addition to the one which came with the roadster (or was the luggage $35k and the car free, I forget).