Have to disagree - it's not the 'going rate', it's a hyped up steroid driven rate that clubs now think they can get away with, which may be Europe-wide now but is clearly being driven by the 'Prem premium' (what originally funded the Higuain transfer mate?).
Only a small number of clubs in Europe are willing to spend so much on single players, and the inflationary effect on the next tier down is also causing reticence amongst even the more ambitious clubs from that level. It will possibly settle down eventually but I think the proof of the pudding will be what happens in the next 5 days - which I couldn't hope to predict, but I'm sure will be fascinating.