It’s your call really.
I always bear in mind that cars I own (or cars of other family members & friends I service) have a known service history from someone who actually cares about their work. Buying a pre-owned car, even in apparently excellent condition, always brings the risk of major repair bills, and making up for poor or missed servicing (regardless of what any service record may show).
It’s not just financial mind, the peace of mind factor must be taken into account. What price do you put on the value of sitting in a vehicle doing 140mph (where legal, you know Isle of Man, Germany) knowing that the car is in tip-top condition, vs doing the same speed in some car you’ve not yet had a chance to fully go over?
And then there’s better the devil you know…
And of course your car may be at the age where expensive things are starting to go wrong (electrics and electronics failing can be very troublesome and expensive).
Also highly car dependant. A Mazda MX-5 with 150,000 miles is nicely run-in, some other makes I wouldn’t touch past 50,000 miles.
Just some random thoughts there, hope that helps.