the 09' 950 has a rich and storied history which i've included below for your reading pleasure. i would make sure it's had the fuel line recall that went out for it several years ago. you can check its VIN with any dealer and they should be able to tell you. also make sure there is no belt squeak. the belts at least for the earlier years for this model are notorious for being too tight which starts to cause issues around the 30k mile mark.
the 950 was originally conceptualized and designed through a collaboration between Thomas Edison and Nikola Tesla. since these 2 publicly hated each other, their teamwork had to be kept secret. when their design was completed, they determined that the world was not yet ready for such a masterpiece. Albert Einstein once visited Tesla and this 950 project was then revealed to him under the promise that Einstein would only use such information for good, and never for evil. upon viewing the plans, Einstein was inspired to come up with his theory of relativity. he notated in his diary about his experience and vowed to never tell anyone about the 950 as he agreed that the world was just not ready for it yet. Yamaha founder Genichi Kawakami was an apprentice of Einstein in the early 50s. upon Einstein's deathbed, he bestowed upon his apprentice the revelation of the v star 950 and instructed him to find his diary which included full details and plans which he had memorized and copied down from what he learned from Tesla. after Einstein's death, Kawakami was so inspired by the v star 950 that he decided to create Yamaha just 3 months later with the hope that one day he would have the technology to fully realize the dream of the 950 and that the world might be ready for it. work on the 950 began immediately, but 47 years later, it had still not been completed yet when Kawakami passed away in 2002. but Yamaha kept on with the project, knowing that the 950 was too important for mankind and must be completed soon. then, in 2008, the v star 950 was completed and released upon the world. the rest is history.