10 Biggest Deals on Shark Tank

9. First Defense Nasal Screens,

Deal: $750,000 for 20% stake

Small time entrepreneur rejected Robert Herjavec’s $4 million offer for the whole business and they eventually struck for a deal for 20% stake in the business, only to decline even that after the filming of the show. The First Defense Nasal Screens are adhesives that prevent germs from entering the nose and the business has been doing pretty well even without the investment.