How right you are.
I sold my Jet Ranger a few years ago and had about 4 PPIs. I was amazed at the variety in competence of the inspectors sent by purchasers. Only one of them was a real specialist in PPIs. The others were technically aware buddies.
One thing is certain, by paying for a quality PPI, whilst quite expensive, you will save money in the long run, or you will be diverted away from a nicely presented dog.
In general, I have found that the cost of a good PPI will be recouped in negotiated discount due to his findings.
Incidentally Savoia, just out of interest, in the last photo, are you the one on the left or the right?
Tam