I agree it could just be a dream type situation with the buyer. I had a situation like that back in 2008 on a vacation summer home that I owned. I didn’t even list it for sale. I bought a house and totally gutted it, added an in-ground heated pool and used it for myself for long weekends and rented it.
I was a bachelor at the time so it was GREAT! I rented it during high season for insanely high rental prices.
One of my rental guests from Europe (wealthy banker) asked me once how much I’d sell the house for. I explained to him that the house wasn’t for sale and I just bought it and gutted it and furnished it. It was a ton of work. He kept upping his offer.
Long story short, I ended up selling the house to him at an insanely great profit. He even ended up buying everything in the house with all the furnishings.
All with no realtors involved for either of us. We just had a lawyer draft up the paperwork and it went super smooth. It was an all cash deal so that made it easier.
It was a dream like situation. Wish that sort of thing happened more often! I never intended to flip it but it would have been crazy not to have sold and I don’t regret it for a second.