Sears offers the Alphaline 3-Outlet Surge Protector, model no. AS803, for $9.88. Opt for in-store pickup to dodge the $5.99 shipping fee. That's $10 off and the lowest price we could find. It's rated for 1,080 joules.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.