Best Buy cuts up to 40% off select HDTVs, laptops, cameras, appliances, and more as part of its 48-Hour Sale, with deals starting from $5.99. (Prices are as marked.) Plus, most items qualify for free shipping. (In-store pickup is also available.) It's the best sale we've seen from Best Buy since last month, when we saw markdowns of up to 45% off. Deal ends September 28.

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