Home Dealnews Costco 4th of July Mattress Savings: up to $1,000 off for members... Dealnews Costco 4th of July Mattress Savings: up to $1,000 off for members + free shipping By ARCOM - 29 June 2021 62 0 SHARE Facebook Twitter Go to the deal page: Costco 4th of July Mattress Savings: up to $1,000 off for members + free shipping