Well first of all, you need a good weapon. If you are very desperate to get a saw sword, make a noob, and go to the bank. Ask for some stuff then some kind people will give it to you. Then you should be high enough with your level. Keep leveling, and see if you are able to kill the ninja leader. If you can kill the ninja leader, it drops about 2k every death. Also, it drops sai, and 'the last samurai'. (sai = 50g) (the last samurai = 15k). Now you'll get money and level up!