For a player of his potential I'd say it is.
Nice bit of hyperbole as well by mentioning Messi.
I was completely serious. Cabaye had a 4 million release clause, now that is what I would call really low for a player of his ability. 15 million for a youngster with a lot of potential really low? Nah..
Consider the fees for Hazard, Oscar, and what Gotze and Muniain would cost. 15m is pretty good in comparison.
Maybe I haven't seen enough of Isco, like I hadn't of Oscar tbf, but I think what Hazard, Gotze and Munain have shown is on a different level. In my defense I don't particularly make a point of watching every Malaga match like some others may do.