Please put a price on him, just to show that a responsible person is willing to pay for him an not a scrote that could lake him fighting, you may want to post if he is KC registered and other details abou his temprement with other dogs etc.
I have two a bitch 8yo and 2 yo dog. Best house and guard dog you could wish for, just moult a lot. But a half hour walk in the morn and eve and a bit of tlc and bein at your side is all they require. Good luck, he looks like a cracker.