How much amount “cash for cars Cranbourne” pay to the sellers of an old vehicle? Please help

As currently “Cash for Cars CRANBOURNE” is doing really well in the suburb. I have also read various positive reviews about them on the internet. But as I am totally new to this industry hence don’t know much about the services of old car buying companies. My only concern is to get a justified amount of cash in return as my car is in good condition. So in this regard, does anyone try the service of this company? If yes, then do they pay well and reasonable amount? Also is there a car removal service that is free or not? Because many companies in town are offering free car removal.