Shrewsbury Town boss Graham Turner has warned Premier League clubs it would take "stupid" offers to tempt him to sell his best players.
Speaking at BBC Radio Shropshire's football fans' forum, Turner revealed 17 Premier League clubs had scouts at a recent game.
But Turner said he did not intend to break up his promotion-chasing squad.
"I've had no phone calls about any player and unless it's a stupid offer, they're not for sale," he said.
"We want promotion, you only get that if you keep your best players.
Strikers Terry Gornell, James Collins, Marvin Morgan and Tom Bradshaw have impressed this season with Collins representing Republic of Ireland Under-21s and Bradshaw playing for Wales Under-21s.
The form of wingers Lionel Ainsworth and Mark Wright has also lead to speculation they are being targeted by clubs from higher leagues.
"If players are doing well, word gets round," said Turner.
The club has seen both goalkeeper Joe Hart and midfielder Dave Edwards both move to Premier League clubs in recent years, to Manchester City and Wolves respectively.
Meanwhile Turner says he wants to extend Aaron Wildig's loan spell from Cardiff City.
The 19-year-old midfielder joined the League Two club earlier this month on an emergency loan until 10 December.
"I'm optimistic we can extend his loan for a longer period," said Turner.
The Town boss is also looking to extend Everton youngster James Wallace's loan for another month.
The midfielder was sent off on his debut for the club in their 2-0 win against Dagenham & Redbridge.
Listen to BBC Radio Shropshire's football fans forum at Shrewsbury Town on Extra Time from 1900 GMT on 96 FM, DAB digital radio or online at bbc.co.uk/shropshgire on Tuesday, 22 November.