I just had kinda the same situation... I had a daily driver for sale, and was going to use the money to buy a truck from a fellow down the road.
I told him I would have the money Sunday by 2p... this was on Friday... He had no calls on the truck.
Low and behold the guys come and pick up the car and I call him at 1p Sunday with cash and he says they just left with it, and he ended up selling it for 200 less than he told me...
I was mad for a minute, but being a seller as well I know that when someone is there with cash and makes a fair offer, you HAVE to sell it... If I wanted it that bad I should have gave him a 100 or so to hold it...
anyways I hope you find what you are looking for!!
Wow I feel better venting on a Sat morning..lol