Macmall also states they will price match any authorized retailer, which Best Buy is. This is helpful for those of us that live in states that Amazon charges sales tax on.
http://www.macmall.com/n/macCustomPages-macCustomPages.115
They may get ticky tacky on the special promotion, but I believe it would work especially since Amazon is price matching.
edit: no go, and what a crappy reason. My chat is below, I don't think he understood sales and margin....but hey worth a try.
them: Hello my name is xxx and my extension is xxxx, I'll be happy to assist you. please give me a second to check on your question.
Josh: Are you price matching Best Buy & Amazon's sale on MBAs?
them: hi Josh
Josh: Hi xxxx
them: not always
because some of the purchases made thru amazon will directly come to us
Josh: Best Buy though?
them: and from best buy there will be sales tax in their purchases
Josh: That is true, but sales tax is a pass through and doesn't impact your margin.
them: its not about the margin, its about the price that the customer is paying
Josh: It's always about the margin! Ok, fair enough. Thanks for the chat.
them: youre welcome