I have an opportunity to purchase one for a very attractive price from a friend of friend. I don't know squat about it and I would basically be buying it to resell. The bike is mechanically sound and has never been apart. Runs great. Anything I should look out for? Is the 426 a turd that nobody will want? Is it a great bike with a decent demand for them? Tell me where I stand. Honestly. And what is an average price for a used 426 in great shape?