Do you like mounts? Do you live in the EU region? If you do, you're in luck because the Winged Guardian mount is 33% off in the EU until October 22nd. If you've been waffling about picking up this mount, or you're just a mount or two away from one of the collection achievement milestones, then this might be the sale item for you.
At the time of publication there is no indication that the sale is, or will be, active in the US. Check back later for updates.
Update: the sale is now live in the US, as well.