There will be no changes on blue rate until August this year, depending on the PASO elections, and the the mid term elections, eventually there will be an official devaluation and deep blue escalation.
Do not make any illusions, this will be a demagogic thing for poor people.
It will have short term effect.
If you want to have good prices on Food go to Ferias Itinerantes
http://www.buenosaires.gob.ar/areas/espacio_publico/mantenimiento_urbano/ferias_mercados/ubicacion.php?menu_id=23759...