I did the research so I think others may need the method too. Here it is. You need a Linux computer to apply these commands.
Step 1. Grab all profiles from the auction page.
$ wget -rl 1 --accept-regex '/damaged-vehicles/[0-9][0-9]*/.*referringPage=AuctionListing' http://www.manheim.com.au/damaged-vehicles/auctions/dq1013/page1/g?rowsPerPage=1000
Note that you need to change the auction ID ("dq1013" is the next Wednesday's auction in Brisbane). The easiest way is to select one of the auctions on manheim.com.au, list all cars in the auction you choose, and simply change the ?rowsPerPage=100
part of the URL to ?rowsPerPage=1000
to be used in the command.
Step 2. Find all hail-damaged cars, filter out all impact/water/fire damaged cars, filter out stolen cars, in my case I also filtered out the manual cars, 4WDs and buses because I am a newbie.
$ grep -Rl 'Hail Dmg' www.manheim.com.au/ | xargs grep -EL -e 'Mechanical Issues' -e '(Rear|Front|Side|Roof|Water|Fire) Damage' -e 'Airbag[s]? Deployed' -e Dismantled -e Impact -e Stolen -e Manual | grep -v -e 4wd -e bus -e utility | sort -t / -k 4 | sed 's/?.*//'
The output will be a list of URIs. like this:
www.manheim.com.au/damaged-vehicles/4617093/1999-toyota-camr…
www.manheim.com.au/damaged-vehicles/4618138/2000-ford-laser-…
www.manheim.com.au/damaged-vehicles/4620766/2000-hyundai-acc…
…
(Google query syntax, if used smartly, may also work, but I am unsure if Google is diligent enough to have prepared the data before every auction)
I also wonder how can I find someone to join me on this Wednesday's auction in Brisbane (Hamilton) - I never had a car and I can't drive myself, so I am not the right type of girl to show up in the auction. Checked a few friends no one can spare a weekday morning.