Walmart offers the Stalwart 16-Square Foot Foam Flooring 4-Piece Set in Black, model no. 75-6402, for $12.96. (Amazon charges the same with free shipping for Prime members.) Opt for in-store pickup to avoid the $5.99 shipping charge. That's the lowest total price we've seen and the best deal today by $7. These interlocking tiles feature jig-saw edge notches and a slip-resistant surface.