Thanks guys, yeah the vehichle in question is subject to RUC too but I think its still got a few kms left on it. He said not to worry about that anyway.
On Friday (I was not present so can't be 100% sure but hubby was there) no one mentioned that the warrant or rego was out or that it us bring it up to date was a condition of the sale. Two guys were checking the vehicle over to make a trade in offer, which was $5k. Hubby apparently signed documents on Friday. We handed the cheque over for the rest on Saturday, at which point we were told the vehicle we were buying needed brake pads for a warrant. Monday came and went with the vehicle still not in our possession because parts didn't arrive. Tuesday we were told parts arrived, should be done today, but they rang me about 4:45pm to say it won't be ready because someone ordered the wrong parts.
As I'd been driving the trade in vehicle unregistered and unwarranted for two days in preparation for the exchange, I wasn't too impressed at having to drive it a third day, since I'm not used to driving a slow as column shift diesel ute! He then told me that if I wanted to, I could drop off the ute and take one of their loan cars for the night, which I did. It was while we were waiting for that to be sorted that he mentioned the rego and warrant. I think because of them having to do the brake pads/rotors/idlers whatever etc to our new vehicle (which he said was quite expensive) that he's trying to recoup some of the money he is going to lose by having to get our trade in vehicle a warrant and rego.
Hopefully hubby is able to sort him out today...