Using the current eBay promotion at Teds combined with Sony cashback valid until 30 September 2015, the A7 series are available for up to $600 total off. The prices listed below include postage.
Prices after $300 Sony cashback:
A7 - $829.91
A7 ii - $1509.90
A7R - $1909.90
A7S - $2309.90
And thanks to jetbombat, don't forget the 2.5% cashback from cash rewards!
If only the a7 was listed reasonably at $1250 like other competitors, instead of the crazy $1400. It's still $120 cheaper, but the extra 20% off seems like it's gone to waste.