SurfStitch are having an advanced boxing day sale (up to 80%) - lots to pick from, some good deals (and plenty of random junk to sift through too ;] ).
Some good deals, in my opinion:
Silent theory shirts for $5.99 (https://www.surfstitch.com/product/silent-theory-basic-mens-… or https://www.surfstitch.com/product/silent-theory-basic-raw-c…). I actually like these shirts, just have to find a good colour.
Bonds undies 4 pk (https://www.surfstitch.com/product/bonds-4pk-action-brief-pa…)
Loads of other stuff - post them below for others, once you secure some for yourself of course!
Express shipping is free over $50, or $5.99 under.
Also - 11.2% cashback at CR!
Everything I look at has only size small available.