What is the aprox value of a derringer style Rossi 22 side by side pistol It was made by Firearms Int'l in Brazil?

That firearm was made in Brazil by Rossi and imported into the US by Firearms Int'l. Importation ceased in 1968 with passage of Firearms law restricting importation of many inexpensive, small handgun. Current value is less than $100 RETAIL, probably closer to $75.