what is "overpriced"?
are your pricing standards based on chinese workers who make a dollar a day?
or eastern european workers in Ikea factories, who make ten bucks an hour?
You can get cheap stuff, or good stuff.
The cheapest couches will be chinese or similar, at places like EASY.
Cheap made to order on Scalabrini Ortiz between Cordoba y Corrientes, there are several places.
There are tons of midlevel custom couch builders around- I had good luck with Vons Decor, several branches around town. There is one on the 3300 block of Beiruti, and there are a couple of other sillone places near there as well.
Or, they have $3000 to $5000 (US, not pesos) cocodrillo couches at BA Design. I am pretty sure the same couches in the USA at the decorator showrooms would be triple that- so to some people, they are not "overpriced". I used to work with decorators in LA who thought nothing of buying ten thousand dollar leather couches.
You get what you pay for, and in Argentina, they dont have the pipeline of Chinese government subsidized really cheap crap they do in the USA. So while you can find cheap-er stuff, its not as cheap as the states, where huge volume, and government policies by both the USA and China encourage cut rate home furnishings. With higher Argentine tariffs, and a population about the same as California, there just arent the amazing low prices americans have gotten used to. And, with 30% wage hikes in China this year alone, they probably wont last in the US for long, either.