If you are considering having your vehicle detailed, I would advise that you be cautious of anyone offering a really low price. Do not automatically assume that anyone that calls themselves a professional detailer is in fact, a pro.
It may well be in your best interest to talk to a detailer who is established and has a proven track record of satisfied customers as well as the relevant insurances.
As with most other things, the price of automotive detailing varies by quite a wide margin. Many people are concerned more with a perceived value as opposed to quality. Know what the advantages are of having to pay a little more for a professional detail. Choosing the cheaper alternative will cost you more in damage in the long run.
Anyone with a hose and bucket can call themselves a detailer; this is what will set them apart.
Consider the following:
Provide tips on avoiding scratches by proper washing and drying techniques. Client education in the aesthetic care of their vehicle should be equally as important as the detailing. The most common cause of surface scratches is washing the car improperly, so I would suggest the professional demonstrate the correct vehicle paint washing technique.