Walmart discounts over 143,000 items as part of its Summer Rollbacks Sale. Opt for in-store pickup to avoid a $5.99 shipping fee, or spend $35 or more for free shipping. A couple of best bets:

Lasko 16" Oscillating Pedestal Stand 3-Speed Fan in White for $18.84 + pickup (pictured, low by $7)

Muscle Rack 48" x 24" x 72" 5-Shelf Steel Shelving for $57.87 (low by $19)