We've spent the past week or so in Asuncion, in Paraguay, in part to escape the cold in Buenos Aires, and in part to do some shopping. Clothes and bed-clothes (from Feria Americana, or Feria Asuncion), pots, pans and cutlery sets (Essen and Tramontina), an Electrolux extractor and an Oster pressure cooker for the kitchen are all approximately a third of the price in Buenos Aires.
We splashed out on some nice buffet restaurants, O Gaucho in San Bernardino for USD 25 / person, Paulista Grill USD 15 / person, Shangri-La USD 12 / person, all not including drinks or coffee. Shopping for food at Super Seis is cheap, Biggie is a bit more expensive but open 24 hours. A litre of Jameson's is USD 25.
It's full of Argentinians and Brazilians shopping, and other assorted foreigners marveling at the prices and thinking about investments. Residency is apparently easy to get (I haven't checked it out, yet).