Well presumably Burnley and Blackburn aren't serious clubs either, if rumours are to be believed that they are trying to sign him.
The last time he played in this division he got 13 goals across the season. Admittedly that was alongside Ndiaye, but from what I recall his link up play and aerial ability was better than any of the CFs we currently have on the books.
His injury record was a problem, but he wouldn't be starting or playing every game if we have him, Campbell, Moore and One to choose from. Would you not have happily had him on the bench today, considering the options we currently have?