I don't know if you are playing Devils Advocate or actually believe that it's a possibilty, I mean aside that in theory any team, anywhere can bid for anyone. However, Lambert is worth way more to us than anyone else. He could well be the difference between promotion and not. Therefore a price tag of 30million is not an unreasonable asking price to us. That said Celtic could win that Mickey Mouse league without Hooper, they can also ill afford to turn down a tempting offer of 6.5 million plus, which we clearly can (otherwise we wouldn't be offering that much).
Thus although not beyond the realms of possibility, in practical terms this is barely a discussion and even less of a news story.