West Ham are keen on signing Keane on loan while Birmingham have been linked with a loan move for Bentley.
But Redknapp is keen to cash in on the trio in the January transfer window, as he plan to use the cash to strengthen in attack and in midfield.
Redknapp said: “Bentley did well at the end of last season. But he obviously wants to go. He’s not happy because he’s not playing and I understand that. Robbie is the same. He’s too good not to play. But if we want to let people go we need to sell them.”
Kranjcar could leave Spurs for around £9million, while the club want £5million for Keane and as much of the £15million they spent on Bentley back.
