Like a lot of people....I LOVE Costco! So I was surprised when I found this list of 14 things I should never buy at Costco on Yahoo! Shopping.
1. Books and DVDs. Usually Amazon has better deals. Up to 20% cheaper prices than Costco.
2. Sunscreen and skin lotion. You don't end up saving because skin creams go bad after a few months. Long before you go through two or three Costco-sized bottles.