Sorry to burst your bubble, but 7FAM are available at Costco. I'm not 100% sure if they stock some of them at the actual Costco stores (quick search, someone did say they saw them at Costco).

However, even if they only sold at Costco.com, the prices are still in the $120-140 for 7FAM, which is a small discount. Personally, I think people are still going to get their 7FAM, from other online stores, from B&M at retail (because of a certain wash), or from other places at discounts (RACK, etc...)