Smashbox cosmetics is having a beauty blowout sale. You can visit the sale by clicking here. Smashbox is such a great cosmetics brand one thing I really love is that you always get free shipping, no matter the price of your order.
Also, several websites that I receive sale alerts from are Gilt Groupe, Shop it to me, and Ideeli.
I have personally purchased items at all 3 sites and have had no problems with ordering or receiving my purchases. I especially like how on Shop it to me, you can personalize your profile to fit a price range, specific brands, or both. You can also invite your friends and receive gift certificates if they choose to join.
If you know of any other sites that are great for sale alerts or private sales, please leave them in the comments! We would love to check them out and share!