Sears offers the Chapin 1-Gallon Lawn & Garden Sprayer, model no. 20000, for $6.99 with free shipping. (Amazon offers it for the same.) That's tied with our mention from three days ago, which included in-store pickup, and the lowest total price we could find by $3. It features an anti-clog filter.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.