I don't think he has become under-rated at all tbh. I'd go the opposite way and say I think he's actually wasted the talent he has by choosing money over the chance to keep winning silverware.
I don't much like Alex Ferguson, but he knows when it's the right time to get rid of a player.
Tis a shame, cos the lad really could've had a far better career for himself- if the first half was owt to go by. IMO he's wasted it. Yer, he's got more money than he knows what to do with, he's idolised the world over but I reckon when he looks back in 10 years time he will know in his heart he let the 'Beckham brand' control him.