This Crane Cool Mist 1-Gallon Duck Humidifier drops from $49.99 to a price low of $26 at Walmart.com. You can pick up in-store to avoid the $4.97 shipping for orders less than $50. You can also get a Gator humidifier for the same price. They are ideal for rooms up to 250 sq. ft. Sales tax is charged in most states.