Walmart offers this Convenience Concepts Metal Folding 2-Shelf Bookcase, model no. 8020-B, in Black or Silver (pictured) for $15.88. Choose Site-to-Store pickup to avoid the $4.97 shipping charge. That's tied with our mention from last May and $10 below the lowest total price we could find for this bookshelf elsewhere. It measures 11-1/4" x 13" x 20-1/2" and folds flat when not in use.