They have a few sales that last for about 48 hours each coming up throughout the month.
Currently it is up to 60% off Sulwhasoo and Su:m37 products until November 8 Korean Standard Time.
Although they also had a 50% off COSRX sale until November 6, but I was still able to buy a lot of their stuff for 50% off today.
Their prices are very decent, a lot of the things that are around 50% off are actually even cheaper than buying directly in Korea! Not sure how they make their money when that happens but I'm not complaining!