Costco Sale: Halo 5 Guardians Xbox One Video Game $33.99 by Rhonda July 21, 2020 2/3/16. Costco has the Halo 5 Guardians Xbox One Video Game on sale for $33.99 (after manufacturer’s instant rebate), now through February 14, 2016. That is $16 off Costco’s regular price… 0 FacebookTwitterPinterestEmail