NEW YORK (TheStreet) -- Shoppers are expected to increasingly buy online this holiday season as their inboxes are flooded with Black Friday deals and coupons. Online retail spending is estimated to increase 15% year-over-year to $37.6 billion, according to Comscore. Shoppers have already spent $9.7 billion online in the first 20 days of November. Brick-and-mortar retailers, meanwhile, are projected to see only a 2.8% uptick to $465.5 billion, estimates the National Retail Federation, which also predicts consumers will make a third of their holiday purchases online this year. ... Click to view a price quote on EBAY. Click to research the Retail industry.