Phone died last week so went to telstra to look at the iPhone 12 mini, sales rep mentioned there "could be" a deal on this week for the iPhone 12. Likely discount due to the "potential" new iPhone launch in a few weeks. Phone avaliable to purchase outright, or over 12/24 months. Appears to be inclusive of all colours.
Make sure you select outright when purchasing. A Telstra account/ID is required, which you will have if you currently have or have had a product with Telstra in the past. See previous deals for discussion requiring that (example), worst case you can go on a plan and should be able to cancel after a month.