Lowe's offers the Emsco Group Raised Garden Bed in Earth Brown for $19.98. (Home Depot offers a similar item for the same.) Opt for in-store pickup to avoid the $5.99 shipping charge. That's $10 off list and the lowest price we could find. It measures 20" x 24" x 10" and features a self-contained, 2-gallon watering system.