Coventry City have rejected an approach from League One rivals Sheffield United for young striker Callum Wilson.
The 21-year-old, who came through the Sky Blues' youth ranks, has already scored five goals in as many games so far this season.
But Pressley told
BBC Coventry & Warwickshire
that they do not expect to lose any of their young players before Monday's transfer deadline.
- Callum Wilson had a month on loan with Tamworth in January 2012, having spent the second half of the 2010-11 season on loan at Kettering.
- Prior to this season, he had netted just once in 14 first-team appearances for the Sky Blues, coming off the bench to score against Colchester United.
"The only way we will sell a player is if our valuation is met," he said.
"But our valuation of our current crop of young players is very high and I don't anticipate anyone meeting those valuations.
"I would never give you an absolute assurance because teams could make that ridiculous offer I'm talking about but, at this moment, I'm very confident we'll retain our squad and if possible add to it."
Wilson made his professional debut for Coventry as a 17-year-old in August 2009 as an extra time substitute in a League Cup tie against Hartlepool.
He then spent three months on loan at Kettering the following season before a further month with Tamworth in January 2012, before establishing himself in the Sky Blues first-team squad over the second half of last season.