Day #49 of 60 Days of Exclusive Deals. Today (12/19) only, these 650-Thread Count Cotton Sheet Sets drop from $150-200 to $45 for the Queen set and $54 for the King and California King set at Groupon. Those are the best prices we found on any 100% cotton sheet sets with this high of a thread count. They come in 6 colors, but not every color is available in every size set. Each set includes a flat sheet, a fitted sheet, and two pillowcases. Note that these sets may not ship in time for Christmas. Sales tax is charged in most states.