United have been linked with moves for several players not least Everton starlet Jack Rodwell.
But Sir insists that he will not be forced into paying an inflated price for any player and instead would be happy with the squad he already has at Old Trafford.
Sir said: "I'm in the same position as I was in the summer.
"There are a lot of players out there, all valued by their current clubs at £50million. Given the prices being asked, I just do not see the value."