Finish the decade with one last shopping spree at Best Buy, because their Boxing Day 2019 flyer is here and you can get an exclusive first-look at all 70 pages now on RedFlagDeals!. Best Buy’s Boxing Day Sale officially starts online on Tuesday, December 24 at 6:00 PM ET, while stores will open at 6:00 AM local time on December 26.. We’ve listed a handful of deals to provide some shopping …