The cost of a Costco membership is $65 per year (really half that if you can share the 2 membership cards you get between two families), available to everyone, and the prices they have there are so good that even my 3-person family saves money each year by shopping there. Every family I know here in my local area shops at Costco, rich or poor, because the prices are so good for many things. I don't see how any of that is exclusionary on racist or classist lines, it seems to me like Costco is one of the good corporations trying to give a good service/product and low prices.