I could be wrong, but I had a company do one for me once years ago (don't recall which) and I got the feeling they just sub people out in whatever area needed. So might be hit and miss depending on particular person. I chose one that guaranteed a lot of pictures, but no test drive for this particular car, because that kept the cost down. But he emailed me excellent pictures of all the spots I requested, and gave me enough information to turn down purchasing the car. It was well worth the money I spent. This was probably 15 years ago now, and I think it was $150 without test drive.