Sunday’s Feria de San Pedro Telmo, one of the city’s biggest tourist attractions, fills Plaza Dorrego [1] with antiques and bric-a-brac. There are also many dealers in galleries with small street-side frontage, including Galería Cecil (Defensa 845, tel. 011/4307-0259) and Galería de la Defensa (Defensa 1179).
Links:
[1] http://www.moon.com/destinations/argentina/buenos-aires/sights/san-telmo/plaza-dorrego