it's most likely a duck, or a dozen bored gamefaqers pretending to be ducks.
http://img270.imageshack.us/img270/8910/ecksdee5ns.jpgWhether they are gilsellers or not, we cannot be sure
however, we are fully aware that there are groups of players that continuously camp the same NMs for long periods of time. We also do not believe that waiting like this for a monster to pop is against any of FINAL FANTASY XI's rules. It must be accepted that some people have more time to put into the game, therefore allowing them to reap the benefits of their perseverance.