With orders of $25 or more, Amazon offers Prime members the Rust-Oleum American Accents Ultra Cover in several colors (Red pictured) for $3.47 with free shipping. (Walmart charges the same with free in-store pickup.) That's the lowest price we could find by $2. It covers up to 12 square feet.

Note: This item is part of Amazon's add-on program and can only be purchased with orders of $25 or more.