I recently booked a SYD-HKT "7 day Flights & Hotel package" through their website (Jetstar). Amazingly, StarClass was $300 and $30 more expensive each way above "Jetsaver Light". I booked into Full Flex SYD-HKT ($100 extra) and *Class HKT-SYD ($30 extra).
This only came up while booking a holiday package, l looked up the flight on it's own and it was over $300++ each way for StarClass.