Short answer: in Victoria a Roadworthy Certificate usually costs about $100–$200 AUD, depending on the tester and how rusty your pride and joy is.
For brand‑new cars you normally don’t pay a separate RWC — dealers handle registration or fold on‑road costs into the sale — but for used private sales the seller will commonly get an RWC in that price band.
If the inspector finds faults expect repair bills and a re‑inspection fee (often another $40–$80); major repairs can blow the total well past the initial certificate cost.
Independent testers and ServiceCentral‑type garages can be cheaper than dealer outlets, but beware 'inspect and quote' traps; call a few local authorised testers for quotes.
Prices vary by suburb and vehicle condition — check local testers or compare listings on Tradingpost or CarShowroom for a quick market check.

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