as he's young, technical, physical, can both defend and contribute to attacks, and could cover at least 2 positions on a high level, i guess he's worth around 40m or even more. tbh i couldn't care less about players' prices, those are completely out of hand on today's market anyway.
my main issue with player purchases is that we have a pretty strong squad, so odds are that for every new purchase, we'd have to sacrifice a current player. and we don't have too much players to sell. lemina will probably leave, licht won't stay too long either, maybe we could sell one of stu&rincon, too, but a big overhaul looks unlikely. u21 players are always welcome.