Price check for one item: other Shopify sellers of the exact same item (same Shopify catalog product or barcode), lowest first, plus similar listings from the same brand that may differ (shown separately and never counted as the same item). "Lowest" only covers sellers Coreplex found. Prices and stock come from the live Shopify catalog at the time of the call. Checkout happens on the seller's own Shopify store; Coreplex adds no fees.