He's a 3-4 million player, but it depends how you quantify the overpay, in dollar values, 2.5 extra is a a lot, but not all that crazy. Baum is overpaid more than that and nobody calls that a huge overpay.
If you look at it in percentages, a 60% overpay is massive and ridiculous, it's like giving turkoglu a 13 million offer instead of the 8 he deserved.
For the club's cap status, percentages are meaningless, it's absolute values that count.
That's why I think some of the criticism is way overblown. It was a bad move to be sure, but let's be honest here, there's no way those two million will come back to cripple us.