Not too surprising he is in fine form at the moment, in fact probably the best form of his life, he is in the top 10 in the stats (9th) (league based) and performing well for Ireland too, so I would not be surprise if someone is prepared to bid over £1.50 for him.
Indeed he is the best in the British Isles at the moment, next best is Kurtis Davis at no 11.
Whether a move is right fro him is another matter, seems to be doing OK at Everton under the Koeman,
seems he has changed some aspects of him game I think.