UPDATE: NO LONGER AVAILABLE
The Company Store has a hot promo code “SLUMBER” which will give you $20 off any $20 purchase.
I got the shirt above for $16, with no shipping charges either, see it here.
WARNING: their site is very slow. You must be patient during the ordering process. It took 5 minutes for the page to load, but I did get my order for free plus I got my delivery confirmation in my email.
Let me know what great deals you can get!