Amazon has built its empire on the legitimate advantages it has over retail shopping: an endless range of products at a steep discount and stunningly good customer service. But it has also benefited from one unfair advantage over its bricks-and-mortar competitors: it does not have to charge a sales tax, which American states levy in varying amounts on consumer goods. Depending on where you live in the US, this can save you up to 12 per cent on purchases, making it foolish not to buy online when you can. Read more
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