There's no doubting that the transfer market is a little bit ridiculous currently.
The figures being talked about this summer are somewhat crazy, whether it's the £1b buyout clause for Real Madrid forward Cristiano Ronaldo, the £85m figure slated for Atletico Madrid goalkeeper Jan Oblak or a somewhat extortionate £60m for Tottenham full-back Kyle Walker.
Some would argue that Everton's spending has got off to something of a rocky start, splashing out almost £50m on a goalkeeper with just one season of Premier League experience and a Dutch attacking midfielder who notched 14 Eredivisie goals during the 2016-17 campaign.
In fact, Sunderland and Ajax will certainly be feeling very happy to have made so much money on players who are not proven at the highest level.
When a club spends such an amount you expect a little more in terms of class and, even though Jordan Pickford was exceptional during Sunderland's ill-fated 2016-17 campaign, the England Under-21 international still has a lot to learn about the Premier League and the Toffees faithful will have to be patient.
As regards to Klaassen, it's a really dicey move.
Manager Ronald Koeman obviously knows a thing or two about the Dutch top league, having managed Ajax, PSV, AZ Alkmaar and Feyenoord in his homeland, so naturally you would trust the 54-year-old's judgement.
However, is it a signing that can help Everton break into the Premier League's top four and qualify for the Champions League, improving on their recent finish of seventh?
You wouldn't think so. Manchester City have already confirmed the signing of Bernardo Silva, so impressive at Monaco, while Liverpool are expected to wrap up the Mohamed Salah deal in the next few weeks and Tottenham have been linked with Thomas Lemar.
And you can bet that, after a disappointing finish of sixth, Manchester United will be breaking the bank to sign a player of real marquee value, even if former target Antoine Griezmann is no longer up for grabs.
But when you add the possible departure of Romelu Lukaku into the mix, then it becomes a potentially dangerous situation for Everton.
By no means would they be guaranteed even a top seven finish should the Belgium international leave, such was their dependance on the striker during the 2016-17 season, with Lukaku netting 25 of their 62 efforts.
After a decent first campaign the top officials at Everton will be expecting Koeman to kick on but can they realistically expect to finish above any team in the Premier League's current top six?
It seems like too much of an ask currently, despite their heavy spending.
So much hinges on the potential departure of Lukaku, who seems destined for bigger things, but if Koeman just hang onto the former Chelsea man then who knows, perhaps Everton could return to the Champions League for the first time since 2005.