Income of professors at Hogwarts?

[Amy]

No: HPFGUIDX 78344

Does anyone have any idea whether working as a professor at Hogwarts 
would be considered a high or low income job?  I'm intrigued by the 
idea that James and Lily could have been professors before their 
deaths, but I don't feel there's enough canon to support it yet.  We 
know that the teachers are paid (since Lupin's DADA position was his 
first paid job in many years).  I'm inclined to assume that teachers 
earn a relatively low income but I don't know anything about the 
income of professors at British/Scottish boarding schools.  I'd love 
to hear anyone's thoughts or input on this topic.

(This is my first post and I hope this topic hasn't been discussed 
too much before.  I did a search and couldn't find anything.)

Amy:)