[Great68]

Costco is definately not always the cheapest on the single items. Lots of times things on sale at other grocery stores will be cheaper, however for the amount cheaper it's not my time and driving around between all those other stores for what those savings are worth.
I hate driving around for shopping more than I need to. Right now I do about 98% of my shopping between Costco (once a month), Country Grocer and Save On Foods which are the closest two grocery stores to m my house(about once a week)

Also, since I'm a gold member at costco the cash rebate is nice. At the very least I've always managed to get enough back to fully cover next year's membership renewal.