The decision would be an unpopular one with the fans but Allardyce is looking long term and wants a bigger, better and younger squad.
"I don't know how much money is going to be available for next year's transfer budget," Allardyce told Wanderers TV.
"But there may be the need for me, as a manager, to recommend to the chairman that we make a sale, to take a big bid for a big player and use that money in conjunction with what the club has found to buy even more, bigger, better and younger players than we've already got."
Meanwhile, Bolton boss Sam Allardyce has confirmed his interest in Villa defender Jlloyd Samuel and says he could swoop if he became available.
Allardyce told Wanderers TV: "I don't know what the situation is at the moment but, if a player with his capabilities came available, I'd be interested, yes."