I went online to Avis today to book a car at SFO for my wedding in September. I used my standard wizard number and an AA coupon code.
Initially the rates came up in CAD and seemed to be overpriced, so I repeated the search. Subsequently, the rates appeared in AUD, which I assumed had to do with a recent trip to Oz (though I now realize was likely unrelated).
I selected a convertible (priced at 400AUD) and went to the preconfirmation page, where it displayed a rate of $180. When I eventually got to the confirmation, the estimated rate was $90 for a week.
I wasn't trying to trick the system and was genuinely trying to book the car - this is simply what came out. Also received an e-mail reflecting the same thing.
I have a printout and the e-mail reflecting this - will they honor it?

Thought it might have been a little wedding treat

yeah, they'll have to honor it as long as it doesn't show an AWD discount code that you're not entitled to use.

That happened to me when trying to book avis last week, but when I tried to confirm and book, it wouldn't let me continue. Drats.

Thanks!

AWD is my normal one, so nothing off there. I had a similar experience to you when trying to confirm, but tried a few times and it came through.

Interestingly, I can't find the confirmation number listed in my Avis profile even though I have the confirmation e-mail. There is one confirmation for similar dates and car type, but without a rate. Otherwise, it looks like the failed confirmation attempts each produced junk reservations.

Not sure if I should call to clean it up or just deal with it at SFO, confirmation in hand. Would like to avoid any issues and make sure they have the car available.

It might be worth a call beforehand to make sure they have the car (but it's SFO so they should have many convertibles). If they charge you the wrong rate & won't budge, you can always fight it with your credit card afterwards.