Most of you are probably sick of seeing the “Black Friday” signs everywhere. Despite its name, the Black Friday sales last longer than just a Friday. It is actually one of those “occasions” that last a whole weekend or even more (depending on the shop). On Sunday evening, we get a ton of messages reminding us that there just a few hours left to buy the bargains.  Later, a few days after it has finished, some shops even send you an email to let you know that the “sales before Christmas” have started…   I know, “Black Friday” is perfect to buy all the Christmas presents you still need to…