If you're up to six, start yourself a new thread and make the order. There is no more price break beyond five. Just be sure not to ask them to split it and ship to two different places. And if you can't find anyone better than Classic to deal with, remember, do NOT deal with anyone there other than Gus!
As far as ammo, Cabela's just had steel for $4/20rd which is about as cheap as it gets so skip the shipping and buy local.