I have had a video conference with a university research center in the U.S. The interview lasted for about an hour and the professor told me that they would like me to come to campus to visit their center. I was told about the salary and it is lower than the average post doc salary that is followed by the NIH. However, he mentioned that there is additional 20 thousands dollars (I think he said for conferences but I am not sure).
The big advantage in this position is that it will allow me to focus on research without being bothered with heavy load of teaching. At the same time, I have been on campus interview for a tenure track faculty position and I am waiting to hear from them. The tenure track is for a position that focuses on teaching but provides me the opportunity to do my own research as much as I wish.
If I am inviting for a campus interview for the post doc position, is it acceptable to inquire about the salary again. Can the salary of a post doc be negotiable?