theodp writes: With Black Friday approaching, Slate's Farhad Manjoo reminds readers of how Amazon.com undersells Best Buy, the Apple store, and almost everybody else. Read his lips: no sales taxes. Unless you live in KS, KY, NY, ND, or WA, you'll pay no sales tax on many purchases from Amazon, giving Amazon a huge — and largely hidden — price advantage over most other national retailers. Amazon CEO Jeff Bezos is certainly no fan of taxes — he explored founding Amazon on an Indian reservation, and recently ponied up $100,000 to defeat a proposed WA state income tax, a good investment for someone who's cashed in close to $800,000,000 in Amazon stock this year alone. So, is Amazon's tax-free status unfair? Of course it is, says Manjoo. Amazon has physical operations in 17 states in which the company and its employees enjoy the fruits of local taxes — police and fire protection, roads, hospitals, and other infrastructure that make its operations possible. Yet Amazon skirts tax collection in most of these places through clever legal tricks.