If we're talking luxury, let's really talk luxury, because seriously, Costco sells diamonds! We're talking engagement rings, necklaces, earrings, and more. All of Costco's gems are GIA-certified, too.
From its $1.50 hot dog combo to its $4.99 rotisserie chicken, Costco is known for the great deals it offers customers. But the wholesale chain's focus on value appeals to more than just ...