Went inside Costco for the first time (under my own membership, that is) this afternoon.
Conclusion: As a singleton, I don't consume enough to take advantage of the volume discount on produce and perishables.
I mean, I could buy the stuff, but it would rot -- my freezer isn't big enough.
The prices on the other stuff aren't all that much better. The quantities are just bigger.
I will probably break even for the year, since gas is 10-15 cents cheaper. The photo printing, tires and other services may come in handy, too. But on the core services, probably not.