Tony Mowbray insists he will not sell any of his Celtic players on the cheap and is not worried about Aiden McGeady leaving Parkhead.
Former Celtic boss Gordon Strachan has been tipped to launch a raid on his old club in January as he looks to revive Middlesbrough's promotion ambitions.
Strachan has been linked with a swoop for Bhoys trio Gary Caldwell, Scott McDonald and Barry Robson, but Mowbray is not looking to cash in on any of his players.
"Every player has a price and if someone wants to offer Manchester City-type money for a footballer then we would listen," said Mowbray.
"But, at this moment, no-one will leave if it's not beneficial to our football club. They will only leave for footballing reasons.
"If nobody wanted any of my players then it would suggest that I don't have any good ones.
"But people can speculate all they like about individuals. Nobody will be going from Celtic Park on the cheap, and if anyone is sold I know I'll get the money back to plough into the team."
Mowbray is also confident he can fend off interest in McGeady after Birmingham City, Tottenham Hotspur and Bayern Munich were linked with the winger.
"Aiden is important because of the emphasis I have on wide players," Mowbray said.
"He has talent. Regarding Aiden, there are no issues as his contract has years to run. It's not even a question as far as I'm concerned."
On possible arrivals at Parkhead next month, he added: "We have got targets for January to help the team.
"Things have progressed. We've had conversations with other clubs."