Math: 928 SRT6 roadsters sold worldwide.

Odds of your finding one at a traditional dealership that takes trade-ins: Slim to none.

If you really, really want one you will be sad for settling on something else. I drove an N/A coupe for about a year and loved it but continued lusting for the 6 and waited for the right deal. Save your pennies, be ready to move when the right one appears as a private party sale.