Walmart offers the Furinno Turn-N-Tube 5-Tier Corner Display Shelf in Black/Grey for $16.60. Choose in-store pickup to drop it to $15.39. (Amazon charges the same with free shipping for Prime members; Home Depot has it from a few cents more with in-store pickup.) That's tied with last month's mention and the lowest price we could find by $6. It features no-tool assembly and measures approximately 58" x 12" x 12".
Walmart offers the South Shore Spark Full 54" Bookcase Headboard in Chocolate for $94.84. Choose in-store pickup to cut it to $91.14. (Amazon charges the same.) That's the lowest price we could find by $18, outside of the mention below. It features three open shelves and a hole for cable management.
A close price: Home Depot has it for $93.87 with free shipping.