From the party invitation:
This month marks the 1st Annivesary of the release of Brink of Battle! To celebrate, we're having a 25% Off SALE on all Brink of Battle products on Lulu and Wargame Vault! Tell a friend and get them ready for the Fantasy supplement coming in June!
Lulu prices are fixed already, and be sure to use the Wargame Vault Discount Code 50392.