Costco Sale: US Divers Adult Snorkel Set $29.99 by Rhonda May 14, 2021 *UPDATE* 5/14/21. Ready for some fun water adventure? Select Costco locations have the US Divers Adult Snorkel Set on sale for $31.99 (after instant savings), now through May 23, 2021. That … 0 FacebookTwitterPinterestEmail