Some people love the January transfer window, and others hate it.
It all boils down to the status of your team, the players you have and the money you've got to spend.
Mid-table clubs with no money and good players can be easy pickings for the cash-rich teams in the Premier League, but if you want something a bit different then occasionally you have to look abroad.
With Gary Cahill's move from Bolton Wanderers to Chelsea comes the first bit of interesting business from any of the Premier League's "top" teams.
With just two weeks to go, we're now down to the period where things start to become more frantic, and more and more stories of offers and bids begin to surface.
Whatever your view on the January transfer window, here are 15 things you might not have known.