After a successful year in the market last season, when Yohan Cabaye, Demba Ba and Papiss Cisse were picked up, the Magpies boss has already signed Romain Amalfitano and Gael Bigirimana from Reims and Coventry respectively, and is looking to add to his squad again.
But Pardew states that unreasonable pricing from agents has to stop, and that the players' representatives need to understand that times have changed.
"You ask any Premier League manager, outside of Chelsea, and we are all worrying about where to pitch," Pardew told The Sun.
"The big problem we have as football managers and chairmen is the valuation agents are putting on their players.
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"They need to understand times have changed."
Ajax's versatile midfielder Vurnon Anita, who the Magpies have been linked with throughout the summer, revealed on Sunday that his club accepted a bid of around £6.6 million, but that it was now up to him to agree a deal with the club.
Meanwhile, Lille's French international right back Mathieu Debuchy on Saturday insisted he still wanted to leave the club, although his club are understood to be holding out for a £6.3m fee.