I do agree that there is a wide range (20K to 150K was given), however I may tend to disagree where the lower end of the range exists. If the range was provided in US dollars because the implicit answer was "In the US, the range is 20K to 150K", I would disagree with the lower end of the range.
I believe that the "Automation Engineer" title indicates that the person has automated experience, programming background and/or training and if not a four year engineering degreee, substantial scientific training along with a disciplined thought process. Given that, the lower bound for a US location would be at least double that provided.
A person who might be able to utilize a tool for capture playback testing or execute tests with an automated tool, doesn't have programming experience or an engineering degree or equivalent training/experience isn't and "Automation Engineer", but rather an "Automation Technican", where the range (in US) would start at the 20K level, but top out substantially below the previously given value.