💯% definitely would change the crankcase seals before trying to start it...Wow that's awesome. It definitely looked like it was barely used if not at all. Yeah I wouldn't sell it even if I put it in my man cave. But I usually can't leave well alone and would probably get it up and running and ride it around. The only thing I would possibly be worried about is some of the gaskets might have dried out sitting there all this time. But maybe not if no fuel was ever pit in. But the only way to really find out is to just put some fuel in it and fire it up to see if there's any leaks. Another 5 to 10 years I think it will be worth even more money. Especially untouched.