It's hard to tell because their pricing strategy is so complicated with the dynamic discounts based on quantity, what else is in your cart, paying by debit card

It's hard to tell because their pricing strategy is so complicated with the dynamic discounts based on quantity, what else is in your cart, paying by debit card vs credit card, etc. The items that were cheaper than Costco weren't way cheaper, maybe 5–10% less, so I considered that they may have some kind of higher level membership that I don't know about.