Costco Says ‘Prices Will Go Up’ Because of America’s Trade Wars. Here’s What Will Cost You More by Brad Tuttle Costco is beloved by shoppers for providing great value and low prices on household staples like cheese, cooking oil, pet food, and beer and wine. Fans especially love how famously reluctant Costco is to raise prices on some of its very best deals, like ready-to-eat rotisserie chickens and its hot dog-and-drink combo, which have been priced at $4.99 and $1.