Walmart offers the Greenland Gardener 42" x 42" Raised Garden Bed for $17.87 $18.49. Choose in-store pickup to dodge the $5.99 shipping fee. That's a buck below our mention from three days ago and the lowest price we've seen. (Outside of the seller below, it's the best deal now by $6.) Made from recycled wood and plastic, it is rot-resistant and assembles without tools.

A close price, Home Depot offers it for $18.82 with in-store pickup.