Vornado Evap 2 Evaporative Humidifier for $49.99.  Shipping is $5.00 for a total of $54.99 shipped.  Here is a screenshot for your reference.  It features built-in humidistat automatically regulates humidity output, three fan speed settings, 1 gallon capacity, 2 gallon output every 24 hours, and is for rooms of up to 600 sq. ft.