Another longshot won today:
https://www.sportsbet.com.au/horse-r...race-3-4913018
https://www.punters.com.au/racing-re...ee/2019-10-18/ (Race #3)
This one was traded 160-200 in BetFair, i.e. people were offering up to 200 to 1 on this one (even slightly more at some stage).
As you can see in punters.com.au the top bookmaker offer was 170 to 1, Bet365 had it for 101.00 and it won.
Doesn't look like laying longshot horses is worth it, it could happen in Austraila or in the UK, it's just not a solid way of making money in my opinion.