Remember to also keep checking to see if there's a lower rate now at Avis.com, after you've booked.

I've twice now modified a week-long ORD rental for next week, where I got $850ish all-in (on a compact) when I first made it 2 weeks ago, then I was able to get it down to $700ish all-in (on an intermediate) 2 days ago, and then today I was able to get it down to $600ish all-in (on an intermediate).

I've noticed this pattern (tho not always with this precise timing) over and over at avis.com with reservations I made more than two weeks out: Sometime during the last two weeks, sometimes multiple times within the last two weeks, rates will suddenly drop (one some car types, not necessarily all of them), but sometimes only very temporarily, so it pays to check daily if you can.

And if it drops on the same car type you already have, and you can't get the new rate to stick, change to a different car type, confirm, then change back to your intended car type, confirm. (Avis.com has trouble sometimes confirming a change of price only but nothing else.)

I wasn't changing AWDs. I was just clicking "change car type" each day to see if any cars (that I considered acceptable) had lower prices than what I already had.