I say it depends. Are you buying it with 66kmiles and planning on putting 15k more per year? If so, in less than 3 years you are at over 100k.
The engine appears to be VERY reliable. Some of the optional equipment (like cameras) appears to suck. As with any car you are planning on keeping well past 100k miles, knowing the history is key, as is being committed to maintaining it. At near 100k miles, that stops being just about oil changes and starts to include more expensive fluid changes, suspension and drivetrain parts, etc. On fancy cars, that gets pricey.
Considering LR4's have now been out for 4 years, I am honestly surprised as to how few real issues are reported here. No catastrophic transmission or engine failures, chronic pump failures, etc. The occasional suspension issue, yes, but nothing terrible.
But be honest with yourself (especially if you are not handy): Are you comfortable the operating/maintenance costs?
To get the car or not is question that only you can answer based on your financial position, mechanical abilities, tolerance of problems, etc.
I bought a 6yo Porsche with more miles than that. But I will drive it 3k miles per year, got it for a great deal, had the full history, and it's supposed to be very reliable. If I get a $3k bill in 2 years it will suck, but I knew what I was getting into - like paying $1500 at an independent mechanic for spark plugs and an oil change - which I did this spring (spark plugs are impossible to get to so I left that to a pro this time).
