Despite the fact that's he's been very prolific for his club Napoli, there's no way Victor Osimhen's market value will reach €500 million. The truth is that during the summer transfer window, Napoli president Aurelio De Laurentiis was trying to scare other European big clubs away with very high price for any club that comes for the services of the Nigeria international and that's because if the fact that he didn't want to let him leave the club in the summer.
That being said, it's understood that Osimhen had a little misunderstanding with the club recently and reports has it that he wants leave in the club in the winter transfer window. So if the reports are true, Osimhen might leave Napoli in January but in anything about £250 million
Osimhen chances of leaving Napoli are still the same as last summer, I agree with you, it looks like Osimhen price will not reach that high. If Napoli insist on continuing to charge high prices and with the aim of making it difficult for their players to move, then Napoli will also have to bear a much bigger risk, namely Osimhen leaving on a free transfer when his contract expires.
The news of the misunderstanding that occurred was clarified directly by Osimhen on his social media account, that the accusation was not true, and Osimhen called for mutual respect and support for unity. I think the response is quite wise, but that doesn't mean ruling out the possibility of leaving in January.