I know nothing about these people, but in my mind the conversation went something like this:
Buyer: I love this horse and I want to buy him. Would you consider one million euro?
Seller: No! I have taken him to this level and expect even more. We do well together and I am attached to him. He’s not for sale at any price.
Buyer: Well perhaps you would reconsider. Five million?
Seller: No… I’m sorry, but he’s not for sale at this time.
Buyer: He is an incredible horse. I would be willing to pay ten million euro.
Seller: Um, wow. I really don’t want to sell him…
Buyer: Why don’t we settle on eleven?
Seller: Uh, Sold.