I'm not saying whether we should or shouldn't go for Neymar, but I think people are looking at this the wrong way. Neymar earns c.40m per season, so for three seasons would cost about 120m, which can be split between base salary, appearances, achievable bonuses, and sponsorship deals with Qatar, etc. An average player costs 70m in transfer fee plus 10m per season in salary, so 120m over 5 seasons, or 24m per season. Is 40m so ridiculous compared to 24m for an average player? I don't care if Maguire starts complaining about his captain's salary being less than Neymar - this is Neymar we are talking about. As one of the biggest stars in the game, he will also bring in significant revenue, so financially I think it is actually a good deal.
Whether ETH wants him is a completely separate matter, and should determine whether we spend 40m of our FFP budget on Neymar.