Sam's Club offers its members the Muscle Rack 5-Shelf Heavy Duty Steel Shelving in Silver Vein, model no. UR482472PB5P-SV, for $49.86 plus $9.91 for shipping. (Non-members pay a $4.99 surcharge.) That's the lowest total price we could find by $5. It features adjustible particle board shelves supported by double-riveted beams and braces, and a 4,000-lb. capacity.