Home Slickdeals Costco Wholesale: Bio Bidet A8 Serenity Smart Bidet Toilet Seat $249.99 Slickdeals Costco Wholesale: Bio Bidet A8 Serenity Smart Bidet Toilet Seat $249.99 By ARCOM - 30 March 2020 108 0 SHARE Facebook Twitter Go to the deal page: Costco Wholesale: Bio Bidet A8 Serenity Smart Bidet Toilet Seat $249.99