D-Glock

I am new to this forum. I have been really interested in buying a used Yamaha R6, any year. I know that people wreck on these things all the time. What are the most important things I should look out for when looking at used R6's? Any advice would be super appreciated. As an example, I saw this bike, but I don't know about it... http://www.ksl.com/index.php?nid=218&a...d=4&cat=144 Thanks!