<A HREF="http://shop.upgradesource.com/" target="_new">Upgrade Source</A> has a zero dead pixel policy, and they have free shipping, but their prices tend to be a bit higher than other retailers. There used to be a store called Monitors Direct that also had a zero dead pixel policy, but I think they've gone out of buisiness.
IIRC, Amazon.com allows you to return anything for any reason, but I'm not sure.