You are right. But keep looking. A few weeks back I was looking at Business Class Flights to Sydney in November. They cost £6300 each. The same flight now costs £4300 each and there are better stopovers to boot. I gather the reason prices are falling is that many of the COVID quarantined planes are now coming back on stream thereby increasing capacity and then the age old laws of supply and demand come into play. I have been told the best time to book is about 60 days out from departure and midweek. Whether this is correct I have no idea but I'm delaying booking mine. Incidentally there is a great music scene in Adelaide.