Brett-EDH
TVWBB Olympian
i'd add to this to try CostcoTravel.com. we have been using them as our travel agency for a few years now and the cash back on membership, citi card and actual vacations saves us around 12% on each trip we book through them.I agree with most of these points.
A couple of years ago, I recouped my annual fee in a single transaction when I bought new tires at Costco. We save a lot when buying Costco gas at home and when travelling, it's almost always the lowest price. Using the Costco Citi credit card got me $700 back on purchases last year, including 2% on Costco purchases and 4% on Costco's already low gas prices.
But I would go so far as to say that it's fine to pay for a Costco or Sam's membership even if your level of purchases doesn't completely justify it. If you enjoy occasionally shopping at Costco for Kingsford Competition charcoal and chuck short ribs and USDA Prime briskets and don't recoup $60 in value, there's nothing wrong with that. People blow money on things far stupider than a warehouse membership!
the money saved by buying in bulk is fine as retail, smaller sized products just seem somewhat unreasonable these days. we still have to run the dishwasher, laundry, need TP, bbq fuel, eat and drink (costco has an amazing wine selection that you can't really go wrong with).