Pardew, named Barclays Manager of the Season on Friday, picked up the likes of Yohan Cabaye, Papiss Cisse and Demba Ba on bargain deals and the Magpies have been transformed from Premier League also-rans to top-four contenders.
Pardew expects their success will lead to big-money bids for his stars this summer.
"It's impossible to restrict Real Madrid, Barcelona, Chelsea, Manchester City from coming in for one of our players," he told BBC Radio Newcastle.
"We have players who are not on the salaries these top clubs can offer.
"The one security I have is that (owner) Mike Ashley is a difficult seller. He is not going to let someone go for £7m, he is going to want top, top money.
"But if Yohan Cabaye gets a call from Manchester United and they tell him he is going to be the next Paul Scholes I am not going to be able to stop him.
"It is going to cost Manchester United a shedload of money, but until we have Champions League football, and we might have that by this weekend, we cannot compete with that."
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
One of the top soccer cleats for control the Nike CTR360 will not let you down on the field in tight spaces.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.