I wouldn't worry about just 3 owners since a lot of people like to sell when the weather gets cold. If you're buying now you have a couple months to go through it and do some maintenance to. Also ask if the stator/regulator have ever been replaced, the 06/07 are notorious for those going bad but that's about it. I had a blast on my 07 600 last year.
Here's a pic except now it has LED turn signals instead and I'm awaiting bar end mirrors.
