So glad you are going to see this little one and giving him a chance.
We have just disocvered that one of our little white kittens is deaf. Had always suspected he was because he is white and although his eyes have now changed from blue, they were very slow in doing so.
It doesn't seem to hamper him at all, though he has never miaowed or purred, I wonder if this is because he would not hear it anyway. He is a normal kitten in every other way but with him you can hoover around him and he does not run away. His brothers and sisters have just been re-homed but he will stay with us as I do not want him going anywhere where there is a chance he may go out.
We have his mum still and she will probably be staying as well, as she has a very bad leg, that has been pinned, but not very well and she walks quite strangely but they are good company for each other and have quite a special bond.
I have a laser toy and will have to see if he likes this as, of course, he can't hear the ones with bells in etc.
Good luck on Sunday.