Don't join in an effort to save money, because Costco often fools you with their prices... I am a member and have actually charted their prices versus a full serivce Grocery store in Nebraska. Their prices on some items are very good, but on other items, you are not saving at all and often paying more than you would buy if you shopped the ciruculars at you full service grocery store. I work in the Consumer packaged goods industry and the membership clubs are not a way to save money...Now, if you like the experience of shopping at Costco, it is worth it as it is like a treasure hunt as they will have unique items that they will only have for short periods of time. Laundry Detergent is a good example of an item I see many people buy at Costco...They have a small variety and you end up paying more than if you would pay attention to the ciruculars at the grocery chains.. my Summary, Don't join to save money, because you probably won't...(you will iv you only buy the few items that Costco happens to be cheaper than anyone else, but often, you end up balancing it out by buying other things that you pay a little more, so unless you are very disciplined and only buy the things that are cheaper, you are not getting the good deals everyone tells you about. everyone will tell you how they saved money on this or that, but they forget to tell you that they dropped 75 bucks on a piece of crap item that seemed like a good deal at the time....They suck you in with cheap formula, diapers, Water, but get you when you buy something else. Having said all that, it is quite neat to walk through a costco and you can find deals....