Apart from a good end to last season, Wickham has done nothing to suggest he is worth 8m and certainly nothing to suggest he is a better option than Kane
And he's not worth 8m but for 5 or 6m he'd be a damn good option as 3rd/4th choice striker.
As for his form at the end of last season for Sunderland he scored 8 goals in 11 appearance for Sheff. Wed in one loan spell and then 5 in 12 for Sunderland. He has the ability to play in the Premier league and has the added "English" bonus, would rather we buy him than Carlos Kickaball for £15m because he's flavour of the month in the Columbian League .