The month of August is essentially chaos in the transfer market. Clubs get the better part of three months to wheel and deal, but it inevitably concludes with teams leaving things late.
For sides like Southampton, holding on to what you have is paramount. For clubs like Sunderland or Hull City the summer is about improving your standing before the meat of the EPL schedule hits. For the contenders, you weigh your competition and spend accordingly—hopefully giving yourself enough firepower to last until season's end.
Making deals in the summer also seems to be a more sane period. January transfers are normally rushed and ill thought; some sides get shafted, others get rich—the way of the world in many respects.
In either event, we are often left wondering: "Was Player Y even worth X amount of pounds?"
Some people make it their life's work to calculate and formulate what a player is worth based on performance, age, previous transfers and host of other meaningful factors, so why not explore their results?
A peer review of sorts.