Most people think Black Friday at Costco means going to Costco on Black Friday. The members who capture the best Costco Black Friday deals do something different. They go to Costco in late October. This is the most commercially significant insight in the entire Costco Black Friday playbook: the same deals that generate weekend crowds and sold-out inventory on the Friday after Thanksgiving are available — at the same prices, with full inventory — four to six weeks earlier. And