For those that fix their own cars this likely does not apply to you. For myself however I am a firm believer in getting a PPI done before purchasing. However in the first half of my life I did not get a PPI done and got no advice. So I ended up having a 50/50 chance of anything good. Since buying used again in the last 5 years, I have had a PPI done on any used car and it has paid off. So this is to address those would be purchasers of used cars, particularly the high end ones, get a PPI done before purchasing.
I am amazed at newby owners coming onto these forums and complaining about unexpected problems on high end cars and they never had a PPI done. That was me many years ago. Learn from the mistakes of others to avoid draining your bank account.