I’ve found some great deals at Costco and on specific items.  Below is a list of some of the things I would buy at Costco again and again.
10. Kirkland Signature Water (approx $3.55 per case of 36 bottles)
9. Cake made fresh daily in bakery (approx. $14.99) feeds about 20-30 people easily
8. Kirkland Signature white kitchen [...]