Costco Sale: Aerogarden Ultra LED Soil-Free Indoor Garden $159.99 by Rhonda July 24, 2020 11/29/14. *UPDATE* 1/5/15. Costco has the Aerogarden Ultra LED Soil-Free Indoor Garden on sale for $159.99 (after manufacturer’s instant rebate), now through January 31, 2015. That is $40 off Costco’s regular … 0 FacebookTwitterPinterestEmail