Am I wrong here?

The guy selling the trailer should have called you as soon as he had cash in hand from the other buyer and let you know it was gone. I went through this several years ago but I was burned from one of my "Friends". I had found a 68 Monaco 500 sitting at a gas station in Lynn Mass. and spoke to the owner of the station about purchasing it from him. I was with my friend when I first looked at this vehicle and this guy really knew how bad I wanted this car.So to make a long story short, you know what he did... yep, he went and bought it right out under me. and then when I found out he bought the car I was PISSED!!!!!!!! Well after a few drinks we worked it out and I ended up getting the car off of him for the same price he paid for it.