The inspectors I have had seem fine, get chatting with them and they're usually sweet. From their perspective they're expecting hostilities from the minute they arrive so the offer of a cup of java and a smile usually gets them behaving themselves.
I just adopt the approach that they can find whatever they like with the car, I've done my job right, the car is well prepared and if this punter doesn't want to leap upon an opportunity to own a well prep'd car, someone else will.
I can almost say with certainty that as soon as you tell this punter he has to fork out for the inspection he will disappear into thin air.