INSIS D.O.O. INSIS doo is a company established in 2009. Our core business is the sale of refurbished and open-box (demo) laptops and computers of different brands like HP, Asus, Lenovo, MSI,Dell... . Our sales include b2b resale program and b2c sales to end customers throughout Europe. All the laptops and desktops are tested, cleaned and ready for shipping.