I've walked in Costco dozens of times and never have been asked if I have a membership or not. They want you to come in and look around at the selection to entice you to join. You can't buy anything, but you are free to walk around. You don't even have to be a member to use the pharmacy. If you have any meds that are not covered by insurance and pay cash for they often will have a better cash price than many pharmacies. Some other things they have cheap (but in bulk/large sizes) are HABA (health and beauty aids) things like vitamins/supplements, pain relievers (aspirin/ibuprofin/etc.), anything OTC, both name brands and the store brand. They occasionally have name-brand clothes for good prices. People that I know who have memberships have had good things to say about food. If you have freezer space to freeze meat/fish that can be a good bargain. Personally I don't have a membership because as a single person who travels a lot I just don't use that much stuff. But for a family, or if you have friends/family members that want to go in together and split things that come in bulk it can be a good deal. I would recommend looking at anything you buy on a regular basis (or things you occasionally use that have a long shelf life like ibuprofin, shaving cream, batteries, etc.), jot down the prices at the nearest grocery store or Target, and then walk into Costco and compare prices. But if you don't have a Costco nearby, also factor in how much it will cost you in gas, wear/tear on your car, the value of your time, etc., to see if it is really worth it.