Prices have been adjusting as of late, but regardless of this inflation you will still find Buenos Aires to be a very good value for money destination.
Have you toured the various museums in Buenos Aires...? What about Tango shows?
A day trip to an Estancia would probably be of interest, I suggest you look into that. What about going to see Iguazu Falls? If you are into wines, then I suggest considering visiting Mendoza.
Cheers,
Alex