My first step would be to do online research about the city, county and its surrounding area to learn more about the area. Look at it very objectively. Moving away is a lot of work and it needs to be something that you need to take into careful consideration.
When salary negotiations occur, it means that there's a fit and the likelihood of taking the job is just the icing on the cake. I would want to table salary discussions until you learn more about the ranges in that particular city/area.
A good measure would be to look up the New York's state personnel department to get sense of the salary ranges for each county. A lot of the times you can see the position title, city/county of location, and the salary ranges. This should give you an idea for Jefferson County.