I'm looking to get a feeling for the bus prices for the trip Buenos Aires to Rio de Janeiro. Plataforma10.com gives me a price of AR$ 2350,00 (~271 US$) with Crucero del Norte, which I find a bit high.
I've read other people saying it's about 100 US$, but haven't found official sources (bus company websites?).
One way flights are about 230 US$ (if you book in advance), which made me think to go for a flight instead.