That is a good price for the Jetting.
That is also a good price for the camera.
The camera will show you any problems you may have like cracks or bellies. It can be worth the money to jet the line if you have roots in the line. If they are using the larger jetting machine line a trailor jet it will cut out any roots (4,000 psi) . The mini jet will not do a lot for your main. Unless you have a lot of grease or other soft stuff in your main.