Amazon offers Prime members the Gladiator 30" Steel Shelf in White, model no. GAWA30SFZW, for $20.25 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise shipping costs $14.67.) That's tied with our August mention and the lowest total price we could find by $12. It measures 12" x 30" x 2.5" and is designed for hanging and repositioning on Gladiator wall systems.