Both New generation (BMW) and original (BMC) mini's are available in Buenos Aires, already imported.
So why go thru the hassle of importing one?
Of course, the new ones are more expensive than they are in other countries, but still a lot cheaper than importing one.
The old ones are not too expensive, especially compared to the USA, where a restored 60's model can easily run $10,000 to $15,000 dollars- thats $30k to $50k in pesos.
One of the great things about Argentina is the large quantity of older cute small cars that are still available used- classic fiats, renaults, minis, and many more, usually in pretty good shape, that are virtually nonexistent in North America.
I just saw a gorgeous Fiat 2300 coupe the other day, obviously a daily driver, parked on the street in Palermo.
In Australia or Europe, these things go for big bucks these days- I am sure they are cheaper here.