I just completed the quest, without meeting the requirements. I took my weapon off, walked into the saloon without any money on me at 19:15 server time and the quest appeared. I defeated him first try. According to the quest info, the Sheriff will look for me after 20 minutes and that seems like when I need the money. Have product you can sell but wait till after you have defeated the thief. Also, I dodged left, left, right, left and aimed for his left as someone had posted earlier. He was easy to defeat.For the second half of the quest, 5 silver bars that the Sheriff gives you next,I have to complete that part on Wednesday.