Onsite Rapid Antigen tests
$49.95
Onsite (nasal swab) Rapid Antigen Tests from CTK Biotech USA
They are most highly rated by TGA, being on the VERY highly sensitivity rating score for accuracy (95%+)
https://www.tga.gov.au/covid-19-rapid-antigen-self-tests-are-approved-australia
Sold in 5 packs at $49.95/pack (including express postage for online orders)