Crystal Palace are closing on an agreement of £14.5million for Millwall's Romain Esse.
The highly rated youngster has been watched by Eagles' sporting director Dougie Freedman various times this season, while he has also attracted interest from other Premier League clubs.
The England Under 20 international, who has made 23 Championship appearances for Alex Neil's side this season, would not be acquired cheap, warned the Scot this week.
'At the moment, there's interest from Crystal Palace, which has been well-documented. How far down the line that is, I'm not sure,' he told the BBC.