Inflatable Unicorn Halloween Costume 40% off + additional 25% off at bigkidcostumes.com
There is a coupon code, trickortreat for an additional 25% that seems to still be working.
Total came to $26.99 + S/H
The Unicorn on sale is a "slightly Imperfect Item - Fully functional and guaranteed to inflate with only minor imperfections"
Link to Unicorn on Sale