White Hart Lane boss Redknapp still rates the Russian international from Spartak Moscow as an important member of his squad, but concedes he could listen to offers for his services.
Redknapp said: "If he wants to leave and someone comes in and pays the money for him that he's worth, then we'd have to look at it.
"But he's not one that I'm crazy to shift out of here, he's a good player, he's a talented footballer.
"I had a chat with him a couple of weeks ago and he said he wanted to move.
"Somebody has to come and make an offer which the club accepts, it has to be a good enough offer for us to even look at it otherwise there is no chance of him leaving."
Spurs have also been linked with a transfer window swoop for West Ham's Upson and Portsmouth stopper James.
Redknapp insisted: "There is no truth whatsoever in that.
"He (Upson) is a terrific player, but it's not fair, we keep getting linked with players and we're really not looking to do anything in the window. I'd be very surprised if we do anything.
"He is a good player, but I don't need another central defender, I've already got good centre-halves at the club."
He added: "David James is a great goalkeeper, a fantastic goalkeeper, world class, but I've got a great goalkeeper here.
"David James is not going to want to be a No.2 anywhere, he is a No.1. (Heurelho) Gomes is fantastic and has been in great form.
"If David James wants to play for England at the World Cup he needs to play, not be a No.2, so that is not a possibility."