Silva, Salah and Lukaku have been among the big summer transfers
Swansea's Gylfi Sigurdsson has been valued at £50m, Everton have spent £90m and Manchester United bought Romelu Lukaku for £75m - so is Newcastle boss Rafael Benitez right to call this summer's transfer window "a little bit crazy"?
Premier League clubs' spending has already surpassed £500m since the end of last season - and business analysts Deloitte say they are on course to set another new record by 31 August.
Teams spent a record £1.165bn last summer, rising to £1.38bn after the January window.
Football finance expert Rob Wilson says the market "hyper-inflation" means anyone selling to an English club is adding "at least 40%, if not 50%, to the deal".
And football agent Jon Smith says a £30m transfer - such as goalkeeper Jordan Pickford's move from Sunderland to Everton - is "the new norm".
This week Deloitte released its annual football finances, which revealed record revenues of £3.6bn for Premier League clubs in 2015-16 - and that was the year before an improved TV broadcasting rights deal kicked in.
It predicted that figure would be more like £4.5bn at the end of this coming season.
Its report also said overall debt is falling and forecast the 20 clubs combined would return to profitability in the coming years.
Is Rafa right - are prices 'crazy'?
This transfer window comes a year after the new £5.136bn TV deal kicked in - a 71% rise on the £3bn negotiated in 2013.
In the 2014 window - also one year after the previous broadcast deal was struck - Lukaku, then 21, was sold by Chelsea to Everton for £28m. The Belgian forward's move to Manchester United is for an initial £75m, which represents a 168% increase in value in three years.
Also in 2014, Swansea signed Icelandic playmaker Sigurdsson from Tottenham for a reported £6.8m. The Welsh club now value the Leicester and Everton target at £50m - a 635% increase in value.
"Revenues keep going up, predominantly because of the rise in broadcast rights values," said Chris Stenson, a senior consultant from Deloitte's sports business group.
"Every Premier League club now has more money and are willing to spend that on players," he said.
"It is the wealthiest league in the world and increasing its value makes it more attractive to sponsors and commercial partners.
"So far we estimate Premier League clubs have spent about £500m in the transfer window, compared with £340m at the equivalent stage last year."