😆
There's no point comparing market value, those things are determine by a whole host of factors of which raw ability is one.
But the overarching point that we shouldn't sign young players because someone of them piss off (which is a trend you'll find if they were over 22 as well) is just stupid. Obviously we should look to sign experience players as well but that's not in contention. If you find a good player, you sign him. Whatever the age.
And playing for a club that just got relegated doesn't tarnish Niang by association, it's a particularly narrow minded view given that we have two players at the club who've spent most of their career in the lower leagues. You judge players on his own merits, not some heuristic fallacy.