I got off the plane and I NEVER buy anything from duty free, but...
I had to snag a bottle of Havana Club 7 Anos. US$16 and it usually runs around US$27 in the stores.
My wife and I are heading to Argentina April 29th (arriving in BsAs on April 30th at 8:30a) and leaving May 8th at 8p.
We're going to spend 4 days in Mendoza, 2 days in Iguazu, and the rest in BsAs. I've saved all of the other threads from TxHookem and Napolean to have ideas on restaurants and such, but if you guys have any new ideas please pass them along.
We're very much looking forward to spending our days getting drunk on Malbecs and eating lots of Argentina Beef and the occasional pasta dish.