I usually try to give the first person the first oppurtunity to buy. But if they miss the set time with no call/ no show. It goes to the next in line. As a buyer I always try to keep contact with the seller before the sale just to ensure them i am going to show, and am intersted. But if you did that, he should have told you it was sold. I just had a deal off of craigslist to buy a cube van from a guy, when i called him I told him I would leave work right then and go get the money and come down, he said no just wait until after work that he would hold it for me, I called him a couple times throughout the day to make sure everything was still a go and it was. Got off of work drove an hour to get it, called on my way and the guy did not answer, showed up and the vehicle was not there, tried calling the guy again no answer, talked to a guy at the shop where the vehicle was and he said the guy sold it an hour or so before I got there. I was pissed because we had a set time and agreement(I was going to give him his asking price) I kept contact so if there was a problem I would not waste my time. He was and asshat for nat answering the phone when I called and saying sorry I already sold it.