My first deal post so let me know if I've done anything wrong.
I think this may be a pricing error as the body and 28-70 kit lens is the same price.
The a7iii body went as low as $2000 from memory and the 24-105 went as low as 1500. So if my math is right this particular kit is the cheapest by approx $730.
The cash portion of the purchase also earns you 5541 PTS.
I'm not sure if the Qantasstaff code works (from the Sony WH-1000XM3 post), but if it does it could savd you another 10%.