The odometer was at 287777 when I bought it and doesn't work so I don't know the exact mileage. My dad had one of these which stopped at 384000 or so.
When I bought the car the front doors didn't open. I fixed this. Also the brakes needed some work but I bought the car at auction so this is quite understandable.
In early 2000 the head gasket went. Put in a new motor from a 1982 XE Fairmont. Now the car goes sweet. Have not had a problem since then. Suspension is completely screwed though as is the steering. But you get that.
I love the XF Falcon and couldn't drive anything else. But mine is pretty stuffed. But hey it's OK.
I had a 1999 Hyundai Excel as a work car for about a year recently and could not wait to start driving my Falcon more regularly. It's big and comfy and drives smoothly.
My 87 xf falcon is not in very good nick due to a long duration of time in the sun. other than that it's a speed machine very quick off the mark. the only problems that I found was the back left door handle broke easy.