Luke Shaw - Manchester United, £30m
Manchester United have spent a record amount this summer. But when it's on the likes of Angel Di Maria and Radamel Falcao, the huge fees are understandable - even if they don't plug the most gaping holes in Louis van Gaal's side.
When it comes to Luke Shaw, however, United were well and truly ripped off. Yes, the talented 19-year-old is full of promise and could nail down a first-team spot at Old Trafford for the next 15 years if he is good enough. Never, though, is he worth £30m, especially when Felipe Luis went to Chelsea for just over half that fee.
Ross McCormack - Fulham, £11m
Speaking of inflated transfer fees, see Ross McCormack, who moved to Fulham from Leeds United for £11m this summer.
The initial fee is believed to be around £6m, though the total package will set the west London side back a huge amount regardless of when or how it is paid.
For Leeds, the McCormack sale was terrific business. For Fulham, the deal could end up a complete disaster - unless the 28-year-old can reproduce his 28-goal tally of last season for the next three years or so at the Cottage. No pressure, then.
David Luiz - PSG, £50m
The World Cup told everyone everything they needed to know about David Luiz. Employed by football clubs as a defender, the majority of onlookers have come to the unanimous conclusion that Luiz is simply anything but.
And yet Paris Saint-Germain deemed the charismatic Chelsea 'centre-back' worthy of a £50m fee this transfer window. The mind boggles.
Again, for Chelsea, this was superb business. The Ligue 1 champions, however, need to seriously rethink their transfer policy if they want to have any real chance of European success.
Saphir Taider - Southampton, loan
When it comes to bad signings, they arguably don't get any worse than Saphir Taider's move to Southampton.
The reason? The Inter midfielder has already been sent back to Milan after just one month at St Mary's!
Taider was brought to the Saints on a season-long loan but sent back "having failed to live up to the high levels of commitment expected of Southampton players."
Shane Long - Southampton, £12m
Sorry Southampton fans, your club features again in our final worst deal of the summer.
Indeed, £12m for Shane Long is just too extravagant to be taken seriously. The 27-year-old is a good striker but, in bringing the Hull City man to St Mary's, the Saints had fallen victim to the very same rule they used to their advantage at Manchester United's expense.
Quite simply, Southampton needed a striker and so had that need exploited for Hull's financial gain. Ronald Koeman's side had money to spend and were certainly victims of the chaotic nature of the transfer market - but negotiating a better price than £12m should surely have been within Southampton's powers.