I work in a Post Office and whilst I try and sell the special stamps, which usually you do have to lick, first, if someone asked for the ordinary ones I would sell them to them. If the Post Office you went to is anything like ours then the clerk will know that she's going to have difficulty getting rid of the footballer stamps before the next special lot (to celebrate 60 years since the Queens coronation) go on sale next Thursday. But that doesn't mean that she shouldn't sell you what you want.