Cardiff City have reportedly placed a price tag of £10m on David Marshall amid rumoured interest from Everton.
The 30-year-old goalkeeper joined the Bluebirds from Norwich City for just £500,000 and has gone on to make over 230 league appearances for the side, including in all but one of their games in the Premier League in the 2013-14 season.
Marshall has two-and-a-half years remaining on his deal with the Championship side, who will play hardball with any attempt to prise him away from the Welsh capital.
The Scot is part of the ninth-best defence in the second tier, having let in 26 goals so far this season.