Well, if he'd known how well he'd play in 12-13 and how sought after he'd therefore be this window, the motivation not to be tied down would've been fairly clear - if he were available on a free transfer, he could've had a fair chunk of that £85m just on wages at Madrid.
Five year contract, £85m ~ £17m p.a. ~ £327k/w :o (or more, perhaps)
Anyway, Spurs will look better run than we are if they manage to get that much for him. Luck's a fortune ...