Amazon has this tower fan on sale for $46.81, clip the $11.24 coupon to bring the total to $35.57. (Usually priced at $59.99)
The Sweethome blog has this as their top rated fan, although the amazon reviews are less flattering, but at 40% off, I thought it was worth a shot! You can always get the warranty and it'd still be cheaper than comparable tower fans.
From their review: "Consistently priced around $60, it's also a great value—a major reason this has been our pick in previous versions of this guide", and now it's even cheaper. (I didn't link to their review, not sure if it's allowed in the post)