Games Workshop isn't the only one having a Cyber Monday Sale (well, besides the companies having sales that started Friday and are lasting until the end of today). Warsenal is doing the same. You can get 30% off your order in their webshop only through the end of today.
Just go and use the coupon code "STRESSFREE" (minus the quotes, of course) and you'll get the discount. Plus, there's free shipping for domestic orders and on qualifying international orders.