Not by much. Kadlec is always available around £5mil and $10 is only about £1.5mil more than that. And if he's doing the business who cares.You paid over the odds for Kadlec mate!
How much is did you end up getting him for? I don't know, every agent is a ***** to me on every Football Manager I play. I've had friends who get players such as Torres and such for around $40-50m whereas I end up paying $100m + extras...
But all in all, Kadlec is well worth triple what I got him for at the moment