The history of world football has been littered with big-name players moving during the transfer window for exorbitant fees.
However, if FIFA's Financial Fair Play rules have their intended impact, fans aren't going to be seeing the kind of sums of money that have been thrown around over the past couple of years.
On one hand, that's a good thing because it can level the playing field. But on the other hand, you're not going to see a club shell out £35 million on a striker who's largely unproven at the top level, which is really great comedy.
The transfer window can be both exciting and nerve-racking for supporters of world football.
It can mean your favorite team can finally add that missing piece to put the club over the top, but it can also mean losing your star player to your most hated rival.
Football supporters are a very fickle breed. Even the most beloved players can go to public enemy No. 1 if they move to the wrong club.
Ahead is a list of the 10 most shocking transfers in the history of world football. Cutting it down to 10 meant omitting some of the most expensive transfers ever.
More than likely, you'll disagree with the list, so let your opinion be known in the comments section.