I don't believe KBB value fits all car values. I've seen their values way below what the actual cars were trading hands for via private parties. The values set by KBB rely on dealer sales of the past.
Every day, there is less inventory of SRT6 cars. We are on the cusp of these cars becoming unavailable outside of private hands.
I'm not saying this particular car is worth $15000.00 or $11,000.00, only that KBB values are fast becoming inaccurate within the circle of knowledgable SRT owners and potential buyers.
My $00.02