The notorious dotted line, the start of a successful career for some, a curse for others. No one knows what the consequences of that pen on paper will be but that's just what we love or inevitably hate.
We've all experienced it, the elation and excitement of a new purchase followed by the inexorable pain when they flop more dramatically than Ashley Young in the 18 yard box.
A nightmare for managers and those balancing the books, an opportunity for others who rub their hands in delight after offloading that mis-firing forward or previously promising youngster who never quite cut the mustard.
While we can't just yet offer an accurate assessment of the now closed winter transfer window, we can at least reflect on those transfers made in 2014 that failed to justify the hype, to say the very least.
Sit back, click through and be grateful your club didn't fall into trap of panic buying or just plain incompetence.
Unless they did, in which case dry your eyes and remember Chelsea coughed up £50 million for the 20 goals Premier League goals scored by Fernando Torres.