Welcome abourd my noob friend!
170,000 is nothing, but make sure the car is priced accordingly.
If it has been well maintained and hasn't been raped day in and out, the engine should go strong until at least 300,000kms. At this age, I would recommend oil changes every 5K.
Log book can be fudged, so don't trust them. If the guy has actual service receipts, you are on the right track.
And lastly, IMO buying interstate isn't worth the hassle, unless it's an ultra rare car.
Bookmarks