Three Brothers Trade Goods is a shop in the Imperial City's Market District, run by the three Verus brothers: Tertullius Verus and Sergius. The third brother, Cicero, only lives there when not doing duties for the Black Horse Courier.
Sergius also has a thousand septims. Like his brother, when bartering, Sergius will buy everything while only selling a variety of miscellaneous items. He sells the unique Akavari Sunderblade. He also sells upgrades for the house in the Waterfront District.