Dell Small Business cuts 39% to 50% off a selection of its Dell desktops, laptops, workstations, tablets, servers, and electronics as part of its Black Friday Presale. Plus, get an extra $50 off select orders of $599 or more via coupon code "WQHZ4HPDF8GT97", or take an extra $100 off select orders of $999 or more via "?360P2C3Q?PB0P". In addition, get 10% off select electronics and accessories via "K2$SVFCVQMPJCT". Most items also qualify for free shipping. Deal ends December 5. A few best bets:

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