Walmart has the 5′ Hyper Tough 4 Shelf Steel Wire Shelving Tower with Casters, Silver or Black for $34. Shipping is free on orders of $35 or more.
This is the lowest price I could find by $13 from other reputable retailers and is currently sold out with many vendors. Most models are in the secondary resell market. The current sale price is 56% off Walmart’s regular price of $60.