You need P2p to do this.
Ok you're going to be getting crab pincers. You can sell 100 for around 30-40kk depending on which server you're on.

1: Go down to the sufokia Gate and go to (8,22)
2: place a perc and start fighting crabs.

You should get around 100 in 30 mins or if u have more than one acount that is p2p then it will take 15 mins. People will buy the crab pincers because they are used for strength scrolls.

Do this for 3 hours straight, you will have 180-240kk

Hope this helps