For the 2nd time, a VIC test has absolutely nothing to do with checking the repairs or road worthiness, (visual) or otherwise, it is a, Vehicle Identity Check, to reduce cloning or ringers. It is also invalid as of October 2015, you no longer need a VIC test to get a logbook.
Nothing wrong with a Cat C, but unless its well priced and your aware resale may take a while go for it, I would feel more comfortable knowing its been fully checked over though.
Very true!! I've seen countless repaired cars advertised as VOSA checked / inspected indicating they have checked the repair when they only check the ID.
For a Cat C, knock off a good 35% off the value, have a really, really good look / extended test drive then if all is well and it's a great price then go for it. If you can't fault it and buy it then someone else will like it when you come to re-sell