Two days ago in PER, I checked out booking an economy car with maximum insurance coverage ( in case I hit a kangaroo or cow) and totalled the car. The quote for the Toyota Corolla Hatchback was $884 AUD. As Hertz had a better deal, I demurred at the time.
Today, after a trip on the Indian Pacific ( where we DID hit a cow) and a short flight, I landed in MEL only to find the cost had become over $1200.
Forget about it! Why such inconsistent Avis quotes? They obviously mean nothing. I eventually got a Budget Yaris for $775 with similar insurance...
No point in believing Avis quotes...

and the image of Avis to me now has ( after renting Avis in Europe for about 6 weeks total is