I list items for specific buyers as "Private Listing for xxxxxxxxxxxxxxxx". I don't include a photo and in the description I write "As arranged with buyer".  If somebody else is daft enough to click on the Buy it Now I can send them a paper clip and they can't claim 'Item not as described'.

Needless to say, I inform the buyer beforehand how the listing is going to look and my reason for doing it this way. I've done about 6 or 7 like this over the last couple of years and haven't had any problems yet...