Can you post up a picture or link? if it is a Grey Ghost, (Painted a silvery grey colour) then that is about right... it's the 1st edition Fatboy and the 1989 timing is about right,..... quite collectable now... so priced accordingly.
if it is a more standard varient then priced high.. but not much £6-7k would be about right.... FB' really hold on tight to thier value...