You need an adress in Argentina for register the .com.ar domains.
If you put a fake adress, they can cancel your domains.
I don't think that there are still good .com.ar available. There are a lot of premiums domains at good price, if you want to ask the price of any in particular, i can phone the owner for you.
If you know any good .com.ar available, tell me and i'll register it for you
