We're looking to sell our car and buy another, however any form of trade description laws don't seem to exist in this country.
Browsing through Mercadolibre, most cars will be for sale at a given price, but that's not the cash price at all, it's a deposit and you'll have to make up the rest with either a trade-in, cash or finance. In my opinion it's very deceptive.
For example:
Buyer beware!