One thing I'm afraid of is his proneness to injuries. Paying huge fee for him would be a gamble. But he is great forward nevertheless and certainly can make a difference to any team. The other problem is that Fiorentina would never sell him to Juve because of the various things which happened between us. That would anger their fans and Della Valle would be on their target for a while.
how is that meant to help? ultimately the clubs still have to find an agreement which they wont and you know how diplomatic jovetic was last summer that he won't hold out just to move to Juve
Honestly though, if City go for other targets(Which is entirely possible if Mancini leaves) and Fiorentina fail to make the Champions League, then they'll have to sell him to someone because the way he's been giving interviews lately, it's clear he want's to challenge at the top.