Many a site has lost out on my business because it wasn't obvious that their prices were ex or inc-vat. I'm not going through all the bother of putting something in the basket, checking out, having to fill in a "new customer" form, just to find that they're all ex-vat and they're not competitive at all.

You want to try returning something as faulty to overclockers.co.uk. Even if the item was DOA, they still sit on it for weeks to "test it" before finally sending you a replacement (assuming it hasn't gone out of stock in that time).