The amount that he is asking for is obviously the down payment correct? And he is going to write it in a contract that he will refund all money for her if need be due to the heart murmur? And whatever he writes in contracts if he writes them. IMO, I believe since he contacted you out of the clear blue and told you of the heart murmur, then I would tell him of the cost and distance and the vet checks and the what if she has to go back and the amount of that cost as well. And ask that he take that into consideration if things don't turn out good, I mean she would still have to be returned. He sounds like he just wants to make money no matter what but he did tell you about her health issue. I would still ask him because he will either say yes or he will say no. I would leave it at that if he says no but I also am not the one who he is speaking to in regards to that adorable little thing Those little eyes sure are pretty and screaming please come get me lol.