I don't know if any particular "sale" has been announced, but some fares have recently gone down a fair sum. I just booked a fall SFO/EZE for $3098 AI (the fare is about $2100, plus the Q, etc.) The typical 7 day minimum stay applies.
Late September. I believe the fares are good Sep-early Dec. Maybe they are good from your direction and you can sit in front of the curtain for a change
Sadly, there is no chance in hell I will purchase a Business fare, no matter how special priced it is... Im sentenced to cattle class for the forseeable future....