Sounds like it has all ended well. I have a mate who was sniffing around one of my motorbikes for years. He used to come over to my shed and help do bits and bobs, a lot on that bike. I put it up for sale locally and, out of the blue, he called me and asked me to keep it for a month, (of course I did not ask for a deposit).
The month came and went, and then another three did the same. Every time he told me his funds were short, and I said no problem, see how you are next month. Eventually the last month ended and he came over to the house, kind of hanging his head, and reckoned he was going to have to abandon the purchase. I told him I understood, and no harm done as I had a buyer lined up.
When he got back from walking the dogs the next morning, his wife had it sitting in their garden with a ribbon , balloon and a birthday card on it.
It is not worth falling out with anyone over a hundred pounds.