Here's an example: Costco will sell the 80-inch Vizio 4K smart TV for $2,500. No model is given, but it could be the E80-E3, which typically sells for about $3,000; we found it for $2,500 at B&H.

but Costco has a super sweet deal. Credit: vizio There's so much hype around Black Friday TV sales from Best Buy and Walmart that we tend to assume that no other retailers can compete. And not ...