If you don't want to trade in games you already own then the quickest and cheapest way is to buy 3 selected games from JB and trade them to EB for 2 Mario games then go back to JB and trade them for AC Shadows or Death Stranding 2 or Doom The Dark Ages.
Trade-in period ends:
- 25 May for DOOM: The Dark Ages pre-order
- 2 April for Assassin's Creed Shadows
- 6 July for Death Stranding 2 pre-order
List of eligible games to trade at EB can be found here. Prices may change daily so call before you buy.
https://www.ozbargain.com.au/node/897244
List of eligible games to trade at JB.
https://www.jbhifi.com.au/pages/games-trade-in-offers
I bought Suicide Squad (PS5), Dying Light 2 (PS5) and Way of the Hunter (XSX) for $45. Traded them to EB for Mario Kart 8 and Super Mario Wonder.
Interesting that Dragon Age Veilgard isn’t in the list even though it’s quite new. Whether you love or hate it, it only came out not long ago.