The first cookware I bought in BA was at a church rummage sale. A pot with lid of stainless steel by Tramantino in Brazil was $18ARS. I've had good luck finding the brand at house sales at a very good price. Stainless steel lasts forever. Steve lives too far from the capital to attend the weekend house sales run by Maria Marenessi where families sell practically everything they own, so Mercado Libre is his only option.
Oh, I love going to these Maria Maranessi house sales... It's a service people can contract to sell all the items in a house, like an estate sale.
It seems like they are on vacaction, but you can check their website where they post the next sale going on over the weekend.
Maria Maranessi y su equipo de profesionales venden en un solo fin de semana el contenido total de su casa, departamento, dormi, oficina, propiedad comercial o inmueble. Ahora también de manera online.