High Mileage is just a one part of the equation.
#1 factor for me is how the vehicle is driven and maintained.
#2 cost to keep maintaining/repairing versus the monetary value of the vehicle (sentimental value is a different story)
#3 environment / condition
It's a personal preference
we will just rely on guidance or recommendation based on internet resources, personal experience, tips from a well experienced mechanic / friends / relatives.
- get the current state / condition of the vehicle
- fix / maintain what is really needed "major/top priority" to get the vehicle back on the road
- tackle the minor items at later time.
- do mods / detailing if you are up to it.
- enjoy driving!