You're not the first to come here in recent days with this question.
 
Near the bottom of the listing page you should see  Preferences >>  Settings,  and clicking on the little pencil icon there on the right,  brings you to where you add your location.  This found on a desktop version when listing.
 
I don't use the app or mobile browser, they're too limited,  I think when listing vehicles too,  it's better to use a laptop / PC and try Chrome,  that combo seems to work best.  If using the app, that may be the issue here too?
 
@owe-be8