"2008 Hayabusa that has been rebuilt on a straight frame in 2010". Doesn't say the frame is a 2010, just rebuilt on a straight frame in 2010. I see a couple of red flags here.....1)purchased without fairings; 2)transmission rebuilt with < 7K miles. Makes me suspect this bike was ridden hard and put away wet.....a beater.
*DISCLAIMER* Just my honest opinion and gut feeling. I'm no expert by any means and do not claim to be one!!