Talk about mis-information. I've owned 7 1200 GS's. All sold to friends at between 30-42k on them. Several now over 100k. None have been problematic. Leaky shocks under wty were the worst any of them suffered in the first 40k. I'm sure the 1150 is very good but lets get real. Sounds like he has a friend who has a friend who heard from someone that the 12's were no good.
As to price, I just sold my '09 with 35k for 11k. Stock as all the extras moved to the new one.