Sure he's run it by his client. I totally agree with you on that. He already said Seba doesn't want to go at this point, so he must have talked to him!
I imagine the conversation going something like this:
Agent: Do you want to move to Beijing? You can get more money.
Seba: Beijing? Nah. Maybe Barcelona, but only if I can be a starter.
Agent: I'm afraid their starting XI is stacked. Want me to try to get you more money from MLSE? They have money.
Seba: Sure. Why not?