Not exactly a sale per se, but the WvG rewards membership is available again for a limited time: http://www.wolfvsgoat.com/products/rewards-membership
It gets you 60% off (excluding sales), the ability to tweak measurements on orders, and access to pre-orders that the general public doesn't get.
This probably sounds like shilling, but the WvG stuff I own has possibly the best bang-to-buck ratio in my wardrobe. Plus it's a self-financed small business, and I'm kind of a sucker for that sort of thing.
Is it ever not for sale? Do they close of membership for parts of the year?
Also, is there another shirtmaker you'd compare it to in terms of quality and feel?