It's quite a fair price for him. He is an Arsenal striker with good experience. Playing for teams like Aston Villa, Cryptal Palace and Everton will be worth it.
This player only performed well for a few moments and after that he started to flop. So it would be too much for Arsenal to ask for that kind of fee for any team interested in him. On the other hand, I'm not sure there are other teams in the EPL or teams from other leagues that are interested in him except the Turkish league or the Saudi league that came to sign him.
If you have watched Arsenal matches more often then you would know that you are mistaken. Eddie has only been given chance to play when Gabriel Jesus is not available. Meanwhile, he scored more goals even coming in during the second half last season than Arsenal so called striker Gabriel Jesus who played more matches than Eddie Nketiah in the last Premier League season. Eddie is what the price that was placed on his head, and you will be surprised that they will come for him even with such an amount.
Niketiah is a striker who has speed and also the ability to score goals, but sometimes his selfish nature in scoring goals actually becomes a Boomerang for himself, so far we can see if Niketiah often becomes an Arsenal hero when Arsenal is at an impasse in scoring with their main striker, Arsenal will of course price Niketiah at a high price because he is indeed a talented and experienced player, Although it does have an expensive price, I think there will be teams interested in recruiting him because indeed he can be a solution for mid-table clubs later.
Niketiah has recorded 38 goals from his 168 appearances with Arsenal, maybe the number of goals is not in accordance with the price set by Arsenal at the moment, but if we look at the number of goals he created the majority when he played as a substitute, so indeed it makes him worthy of being considered one of the good strikers today, I think if there is a club that gives him one main place consistently, of course he can continue to develop and can become a great striker in the future.