Wargamer said:
http://www.thewarstore.com/
20% off GW stuff, $6 Shipping in the U.S. no matter how big your order size.
But due to GW's Internet Orders Policy, you have to order by phone or email
See here for how that is done
http://www.thewarstore.com/TheGWInternetOrdersPolicy.html //
http://www.thewarstore.com/GWAVAILABILITYLIST.html
They also sell bitz. I've been buying from them for almost a year. Great Customer Service.
I don't know what their deal with 'no internet orders' is... Haven't heard that as a GW policy before, every other site allows internet orders.
Anyway, Maelstrom Games is the best I have found. They are based in the UK, but UK is generally the cheapest place to get Warhammer anyway, they will ship worldwide for free, they've got a customer loyalty rewards scheme (I recently got 10 pounds of free stuff!) and take further discounts off larger orders, discount is 10-15% off RRP UK prices.
Only problem is in the last year or so, they have been taking a while to dispatch orders, even when the stuff is in stock. People have waited up to a week or two before stuff gets sent, but that doesn't bother me for the price I get, never had an order go bad.