Where can I find the limits for sports betting?
For the max limits it varies so you have to add your preferred market on to your betslip and use the maxbet button on the side.
That is not entirely true because maxbet takes into account your balance so it will be equal to your balance in 99% of cases. If you have no money on your account you can't check the limit.
I am not sure if all accounts have same limits but from personal experience I can confirm that Sportsbet has very high limits for all major sports/leagues.