Wyness, who ran Everton from 2004-2009 and now advises top-flight clubs, believes all parties will push for a sensible deal following Grealish's season-ending foot injury. The 30-year-old England international was performing exceptionally well before the injury, recording four assists in his first five games and winning the Premier League Player of the Month award in August.
With Everton currently ninth in the league and showing ambition under their new stadium, Wyness expects the transfer to be completed during the summer window at a significantly lower price than previously discussed. Grealish will likely have to accept a pay cut from his reported £300,000-a-week wages to facilitate the move, with Everton having already borne the cost of his loan this season.