How about 30% off Paula's Choice?

Disclosure: Affiliate links.
If 25% off didn't tempt you, Dermstore has all of their Paula's Choice stock marked down 30% right now. And they have free shipping and free returns. They don't sell everything that Paula's Choice makes, though, so depending on what you need, don't forget about the 25% off from the Paula's Choice site (you could place separate orders from each site, since there's no free shipping minimum!).

And if you add something else that isn't already on sale to your Dermstore order, you can use code OCT20 to get 20% off that too.

I was alerted to this sale by an awesome member of the Our Beauty Talk forums, which is a great place to find deals and to chat about beauty stuff.