If the frame was straight, that's a pretty fair price for a complete bike.
But shelby's used pretty thin tubing, and trying to straighten that chainstay out wouldn't be a good idea with a motor on it.
I have a '37 Shelby frame I built into a race bike, and cracked the seat tube and down tube where the motor attached, cracked the middle bar, and broke the chainstay from the pressure of a rear drum brake.
I'd buy that just to fix up and pedal if it was near me. But I gots the tools to fix it.