If the rumoured fee of £15M is accurate, he's worth more to us this season than we'd get for him. If he can motivate himself for one last year then a massive payday as a free agent, that makes more sense to me than us having to replace yet another major figure in the team this summer
Unless, of course, we believe that his replacement will only be available this summer, in which case we may act now. We could even do what Liverpool did and leave a younger goalkeeper on loan at their parent club until next season in order to lock someone down this summer