C-patex is an Argentina virtual currency exchange, I know of only two exchanges from Argentina and they are not very popular virtual exchanges because they have very few users and hence a low transaction volume and liquidity.
To be sincere this exchange has a great interface, low fee and it even allows U.S traders to use it's exchange platform but due to low participation I have restrained from using the exchange. It is very hard to have your sell or buy order delivered on time cause most days the transaction volume on the exchange barely exceeds $600. I'm not so impressed with the way things are on the exchange and I think the exchange needs to get something done as soon as possible to get more active trade participants.