How much is my jane austen book worth?

I came across a copy of Northanger Abbey by Jane Austen resently and bought it . Now im wondering how much it is really worth it was published my Richard Edward King (R.E.King) and i know he only publised books from 1854-1916. Its in fairly good contions itsa red hard back right with only Northanger Abbey on the front in gold and its underlined. and on the side it only says Northanger Abbey and Austen. There are emossed striaght lines all the way around the top and bottom i cant seem to find another one anyone ive looked.