West Ham United boss Sam Allardyce accepts England trio Carlton Cole, Scott Parker and Robert Green all want to leave.
Cole, Green and Parker are expected to depart before the start of the new campaign.
Allardyce admitted: "The three of them will all probably all want to go to clubs in the Premier League if they can.
"We will just have to see how things develop. In my experience people will think there will be a firesale but the owners [David Sullivan and David Gold] have told me that will not be the case - that they want the true value for every player if they are going to sell him.
"There will be clubs who will believe they can pinch a player just before the deadline and my experience tells me that someone will try and do a deal in the last few days, leaving us little or no time to find a replacement.
"Then, it is better to bite the bullet and keep them because they will help get us promoted. I'm hoping that, if these clubs want our players, they make an offer soon because, if they have to go, it will be easier to replace them now than in a month's time."
