Go straight to the top of the map above Modoc and poke around in the top 5x5 (maybe more) and you should run into Trader Willy. You can pickpocket , barter, or kill him for it. Even after you kill him and his guards you will still occassionally run into him in this area.
모독에서 곧장 윗쪽으로 올라가면 만난다고 하는듯 합니다만..
인카운터의 맵은 정해진것이 아니고, 랜덤이라는것을 생각하시고
위에서 설명하는것은 참고 하심이 좋을거 같습니다.