Walmart offers the Honeywell TurboForce Air Circulator Fan in Black, model no. HT-900-WMT, for $13.94. (Amazon offers it for the same price with free shipping for Prime members.) Opt for in-store pickup to avoid the $4.97 shipping charge. That's the lowest total price we could find by $4, outside the mention below. It features three speeds for coverage up to 27 feet away.
A close price: Target charges a few cents more with free in-store pickup.