Ayr manager McCall has suggested that the Scottish outfit could sell the young striker for £500,000, while club chairman Lachlan Cameron has said that he will not part company with the former Scotland Under-21 international for £200,000.
Cameron has also suggested that he would like the striker to be at Ayr on loan for the second half of the season.
Cameron told The Scottish Sun about Shankland: “In a perfect world that would be the scenario we’d like — to have Shankland loaned back immediately.”
The Ayr chairman added: “The only thing I’ve heard is Swansea were going to offer us £200,000 for Lawrence. I’ve not talked to Swansea directly and we’ve had no official communication. That £200,000 does not really do anything for us.”
McCall told The Scottish Sun: "Our chairman has gone on record saying we had received a bid of £200,000 that he immediately turned down.
"The only way the chairman will change is if someone offers ridiculous money like £500,000 plus for him.”
Shankland has scored 18 goals and provided four assists in 16 Scottish Championship appearances for Ayr so far this season, according to Transfermarkt.com.
Ayr are at the top of the Scottish Championship at the moment with 34 points from 16 matches, a point clear of second-placed Ross County, who have played 17 games.