Maybe I am wrong then- all the cheaper ones I have seen, in the 400 to 500 peso range, have been wired, but that sounds like a deal.
Basically, they give these away, and make their money on the ink. If you consider how expensive it must be to actually build a scanner printer copier like this, then send it across the ocean to argentina, pay duty, and then add in the retailers markup, you realize these are being sold for way below cost.
But once you have it, you have to buy those 200 peso ink cartridges on a regular basis.