Two alpacas sold?

A couple days ago we had a guy call saying he wanted to purchase the alpaca that we had listed. He was using relay service for those talking on the computer or who are deaf. I gave me his email and asked me to forward more information. After talking a few times via email, he said that he would like to purchase two of them. He was going to forward payment and then he would have someone come to pick up the alpacas for him. Whoo ho. Two sold. Or are they?
The payment should be arriving today, but I just have this FEELING. It just isn't right. He says he's buying them for his children as a gift (which is what we did). But he doesn't care which one we give him. Not what they look like or even asked what their temperament was. Wouldn't that be important? He didn't know they were herd animals, so at first he only wanted one. After I explained to him they were herd animals he said that he would get the two for his children then. He doesn't seem to know anything about alpacas, which I suppose isn't uncommon. We knew a lot less than we thought we knew. In his first email he mentioned something about puppies. When I told him that they were not puppies, he said that he understood and was very interested. There are no huge waving red flags, but I just have THAT feeling. Somehow, this guy is going to try to rip us off. Ill keep you posted...