Sewer Imaging Question

[Scott Weaner]

One of my houses had a leak in a sewer line. Fortunately it was something minor, but the plumbing company has offered to image the sewer line for no charge. While free is good, they, of course, will want to get some paid work out of it. As I don't want to be taken advantage of, what should I be on the lookout for? If they feel that the line needs cleaning, what should I expect to pay?