There's plenty of reasons why there are low mile bikes out there. My 1990 K75RT only had 6,700 miles on it when I bought it in 2001. The reason was that the original owner won it at a rally and had other bikes that he preferred to ride.
My 93 K1100LT had less than 14k on it when I bought it in 04. I bought from the second owner who only put about 6k on it. I guess he didn't like riding it much. It was covered in dust when I bought it and he was selling it buy a Vrod.