If the name on the marquee read Leonardo Bonucci, then it'd be understandable. In fact, Bonucci's going rate is supposedly the same, €60m (or £50-51m), although since he's unlikely to actually go anywhere, the going rate is really a bit of a misnomer. It's more of a not-going-to-happen rate.
Fellow Serie A center back Kalidou Koulibaly, on the other hand, seems to be very much going. Going places. Going to leave. Going to the Premier League?
...Napoli's official line is that they will not accept anything less than €60m. According to today's exchange rate, that translates as £51.6m — considerably more than the £42m Manchester City are reported to have paid Porto to sign Eliaquim Mangala in 2014.
-source: Evening Standard
Almost £10m more than the current Premier League record fee paid for a defender.
Aurelio Di Laurentiis must be loving every minute of this bidding war, which has now firmly entered ridiculous and unreasonable territory. We probably should turn around. Unless we have no other option?