I have a friend that purchased an 09 SG at the end of this summer. It is a nice bike with no visible abuse. It is mostly stock w/ 11,000 miles, he paid $14,500.00 I would take that deal if I hadn't bought one last March. I paid $5,000.00 more than that.
I personally don't think most rental bikes are abused, they may be driven hard but I'm sure most of us drive our bikes hard from time to time. The ECM won't let bikes be over revved and a test drive and a close inspection will show up alot of potential problems, plus his bike still has 12 months of warranty for any problems to show up.