Am I Being Unreasonable? Original Owner Wants Car Back

If y'all want to disagree with me, that's fine, but please elaborate why, as my reply clearly straddles the fence.
Maybe you should have read all the other posts before commenting. And let's face it. It doesn't pay to be a nice guy to strangers when they aren't being a nice guy to you. I agree with most of the other opinions. When you have the title then it's yours and no one else's.