I only paid $14K for my '07 GT/CS 'Vert with custom interior in January, but ... I am extremely hard to "sell." I always get the deal I planned or I drive away. I probably paid less than a grand over what it cost them wholesale.
I would list it for $13.5K and let them talk you down as much as you are comfortable. You could probably make more putting stockers back on and selling Foose wheels separately.