I haven't yet sold my boat, and I haven't really experienced that other "best of days". When I started out I had 2 partners, one of whom dropped out. We paid him his share, the title was in his name, he asked that we allow him to continue to sail it, we said sure, since we always want company.
We got 2 new partners who were also yacht club members, did the arithmetic and figured that even with dues it was cheaper to join their club, and have 4 partners, than it would have been to keep paying a commercial marina.
Our former partner now insisted that we had broken our agreement, since non-members could get onto club property only if a member accompanied them, and he thought we had agreed that he'd be able to sail by himself. So he demanded more money before he'd sign the title over.
Finally this year I bought out the other 3 partners. A friend of mine insists then that I've bought the same boat 3 times.
I can't say that any of the times I bought the boat were my happiest day. I've had many much happier days since then sailing it. So I guess it's also going to be untrue, if I ever sell it, that that'll be anywhere close to a happy day.