Obviously any club will enquire first, but us enquiring will make them think oh here is Manchester United, let's put 80m on De Ligt, the issue is even if we try to negotiate, they'll start from 80m, and I think De Ligt is worth only 30m, not to mention the player's camp will definitely demand high wages and high agent fees, I really think we should steer clear, plenty of options in the market.
As others said in the thread, perhaps a loan with an option that is decent is the only way to make it work for us, if De Ligt excels with us then we sign him, if not he goes back and we avoid paying top dollar for someone who's not worth it.
All I'm saying here is we should be smart and economical, I'd rather we play academy players instead of paying huge amounts for players that don't perform better than an academy players.