Mwave offers the Optimus 7" Twin Window Fan
in White, model no. F5280, for $27.49
with free shipping
. That's the best price we could find by $9, outside of the price below. It features a rain-resistant motor with two speeds, adjustable slide screens, carry handle, and feet for use as a free-standing unit.
Don't mind picking it up? Walmart
charges $27.99 via Site-to-Store pickup.