I get the point you're making. And maybe there is a very far fetched scenario where it happens. But club aren't selling Mitoma this window. They don't need to, want to and nobody is coming in with a stupid money offer anyway.
In the January window the club simply said - to Arsenal - Caicedo was not for sale - and this was after he'd publicly come out and said he wanted to leave. And he stayed.
I read today that he is , in fact, about to sign a new contract
*On Friday tbf.
https://www.teamtalk.com/news/exclusive-brighton-fend-off-man-city-bumper-new-kaoru-mitoma-deal-imminent