6 myths about Costco that aren't true, according to members who shop there weekly

• Costco opened 40 years ago and now has over 100 million members worldwide. 
• That success has been followed by certain myths about the chain and the people who shop there.
• Superfans David and Susan Schwartz said it's not true that Costco only sells "super-sized" products.

Costco opened its first warehouse 40 years ago in Seattle.

The decades since have seen the retailer expand exponentially, and today, there are 871 Costco warehouses worldwide.