Walmart offers the Greenland Gardener 42x42" Raised Garden Bed, model no. 105981, for $26.17. Choose in-store pickup to dodge the $5.97 shipping fee. (Home Depot charges the same.) That's the lowest price we could find by $11, although we saw it for $4 less in March. This kit features recycled plastic and wood construction and holds six cubic feet of soil.