Darren Ferguson is looking to overhaul his Peterborough squad after announcing that as many as 10 players could leave London Road in the summer.
Northern Ireland midfielder Grant McCann was among eight transfer-listed on Monday, while goalkeeper Joe Lewis was one of two released.
"I know who I want to bring in," Ferguson told BBC Radio Cambridgeshire.
"The chairman is trying to get two, if not three, done before any sales. I've prioritised three bodies that I want."
Defenders Mark Little and Scott Griffiths, strikers David Ball and Nicky Ajose and midfielder Matthew Breeze join Paul Taylor and George Boyd on the transfer list, while the contract of Danny Mills will not be renewed.
Ferguson explained that McCann and Little have been transfer-listed after suffering injury-hit seasons.
"Grant has got a year left [on his contract], he's obviously not getting any younger," said the former Preston boss.
"I just feel that if Grant finds himself a club he can move on, because at the moment he doesn't feature in my plans, it's as simple as that.
"Mark knows what sort of a season he's had. He was excellent in the first part of the season, but injuries have affected him and Grant, these things happen.
"With Craig Alcock having such a good season, I want to play him right back, and I will be looking to get another right back in. At the moment Mark doesn't fit into my plans.
Ferguson also said that new faces could arrive at the club even before any further departures.
"I wouldn't say they are close, they are ongoing," he continued. "These things do take time. We need to make sure, if we can, that we get them.
"We'll try to get them done before any money comes in for Taylor or Boyd. Then we'll try to shift those on and we'll do another bit of business.
"If we can get the ones in that I really want then they will make an improvement to the squad, I've no doubt about that."