Hi, total newbie here, looking for advice/assistance.

I've offered to help my elderly relative sell his car - he suggested a wrecker, but I thought I would ask here first. I've listed below all the information I've been able to get from my relative, and would be really grateful for any advice or suggestions about the best method to sell the car (wrecker / FB marketplace etc) and any thoughts re what to ask dollars wise. We are in South Australia. I'm hoping to get some photographs later this week.

1983 Nissan Patrol, 239 cubic inches, 3.3 litre diesel motor (believe MK as it apparently has rectangle headlights)
2 door
6 cylinder
5 speed all syncromesh gearbox, close ratio
body condition is poor (only 1 door half works - the driver's door)
runs and is registered and roadworthy
headlights are stuck on high beam

Thanks (and please be kind )