I was looking at the best price for a sim card for Bali and Klook looks to have up to 50% off some Bali sim cards which are pick up on arrival. It was by far the cheapest I could find.
All 30 day sim cards:
18GB by Telkomsel
AUD $10.45 WAS $20.85
35GB by Telkomsel
AUD 18.75
51GB by Telkomsel
AUD 21.79
Most the sellers are the airport are charging 2 to 3 times the retail rate. I think I paid more than $10 buying the last 30 day sim card on the street so I'm ordering mine with Klook this time