He is a good player, and if he wants more money at his age, then that's up to him, although he wasn't being paid peanuts at Arsenal. Will be a big risk for whoever takes him.
I am sure in the future though he'll realise he made a mistake. He was idolised last season at Arsenal and could've finished his career as a club great, but won't be appreciated like that anywhere else. Believe Juventus have given him until the 7th to make up his mind whether he wants to join them. City it seems have turned their attention to Higuain, not sure they need another striker though anyway.