Sadly no on the good deals to be found here for baby stuff. Any chance you can go to the US to do some shopping? I'm heading there next week to stock up on everything.
How do you feel about used things? I know some people have had lots of luck stocking up on moving sales.
So many Argentines that can afford to do the trip to the USA for the baby stuff too. On the flights back you'll see tonnes of strollers / pack n plays etc
I would definitely take advantage of moving sales -- especially for things like bouncy chairs / swings / activity tables / gyms / high chairs / baby carriers etc -- these are things that you get 3 - 6 months use out of tops. And the expat sales are great because they will have items that you won't find on the local market or are better quality than the local option.
For things like breast pumps -- buy them in the USA or have someone bring one down. You can rent them from Medela Argentina (http://www.medelasml.com.ar/h_alquiler.htm) but I the cost was still very high. A single manual Avent pump here costs more than a dual electric from the states. Breast pumps are a pain in the butt investment because they don't necessarily work for everyone, it's kind of a risk that you might buy a few hundred dollars contraption that doesn't even work for you, but mine was a god send. If you're planning to breastfeed I don't know how you'd do without -- otherwise you really are attached to your baby for as long as you breastfeed -- I breastfed mine for 13 months, by the end it was just one feeding a day, but for a good while it's 6-8 feedings, then 4-6 etc and without the pump you really can't leave your kid alone with anyone else.
Speaking of which, formula here is also super expensive. We never used it, I was lucky enough to have milk. At the end we tried to get him to have some of those UHT baby milks, but he didn't like it and so he just doesn't drink milk at all now, he has yogurt / cheese / queso untable etc.
If you get a breast pump, get milk storage bags from home as well. Oh, which reminds me -- I have a bunch left over (like 50 I think!) that I got via Amazon -- Lansinoh ones, only 1 of them ever leaked. If anyone here is interested, let me know!