MacMall gets mixed reviews from people. Their return policy, especially on new Macs, doesn't allow you to return it to them(I don't know about external HD's). That is one reason I didn't use them when I have purchased Macs in the past(I will pay the tax and get it directly from Apple). I have ordered small things from them and had no problem. I'm just leary of them on big ticket items. BTW Amazon's return policy is really good.