NSW Private sale used car

[Rav]

Hi
I bought a car on Saturday, the advertised kilometres was 120000 but the actual on the car is 210000, I saw this only today that is Monday, all the money paid, is there anything I can do?!?

 

[Tim W]

For one thing, you'd have to show that it was not a mere a typo in the ad.

 

[Clancy]

When you buy a private sale vehicle, don't you have to both sign off on the rego paper? So, i am assuming the correct mileage is right there in front of you on the document that you signed?
I am just asking? Not implying that is an excuse for trickery on their part.