Costco Sale: Safety First Alpha Omega Elite 3-in-1 Car Seat $69.99 by Rhonda July 21, 2020 7/22/15. Costco has the Safety First Alpha Omega Elite 3-in-1 Car Seat on sale for $69.99 (after manufacturer’s instant rebate), now through July 26, 2015. That is $20 off Costco’s regular … 0 FacebookTwitterPinterestEmail