Thanks so much to reader Penelope for the tip about this one!
Now through 2/7 on the Birchbox site HERE, every item on that page will be 30% off once you add it to your cart (40% off if you're an Ace Member). Plus, the first few rows of items also ship free (otherwise, you get free shipping on orders $50+). Also, if you spend at least $35, you can add this Mystery Pack to your cart for FREE (regularly $10). The samples in that mystery pack change frequently--take a look at the reviews to see what customers have received in the past.
As of the time of this post, there are a few shades of Ofra Liquid Lipsticks and other nice deals on the sale page. Hurry over and check it out before things sell out.
Thanks again, Penelope, for the great tip!