i have one at 98k 50 i put on myself. other than brake pads ive had no real issues although im getting ready to spend 1700 on new valve cover gaskets. i have had mine since 2015 i bought it used with 40 k on it from lr dealer.Whether you buy at 100k or 70k or even 40k miles at this point, history and prior maintenance is key. Look for one with a lot of records of maintenance.
I'd have no problem buying one at 100k plus miles. Heck, mine has 110k miles and I'd certainly buy it right now.