1. Perishable Produce: Buying bulk perishable items may lead to waste.
2. Small Appliances: Better deals can often be found during sales events or online.
3. Books: Costco's book prices may not be competitive.
4. Diapers and Baby Products: You can find better deals and discounts elsewhere.
5. Cleaning Supplies: Prices may not always be lower at Costco.
6. Clothing: Quality and value may vary, and alternatives could be better.
7. Toilet Paper and Paper Towels: Not all are cost-effective; compare unit prices.
8. Perfume and Cosmetics: Specialty stores or online might offer better prices.
9. Mattresses: Limited selection; dedicated mattress stores offer more choices.
10. Prescription Medications: Prices can differ among pharmacies; shop around for better deals.