To get an unlimited number of gold bars, simply complete the following steps:

1. Create a manual save (Pause Menu, Story, Save Game) so you can return to a save file without the exploit, if desired. Also, disable autosaves to make this easier (Pause Menu, Settings, General, Autosave Off).

2. Go to "Limpany" a burned-down village just slightly northwest of Flatneck Station.

3. Open the lockbox inside the burned-down Sheriff building, but do not loot anything from it. There must be a gold bar and letter inside. If you do not see the letter, it is because you already bought the "Special Horse Stimulant Pamphlet" from a Fence, and this exploit will not work.

4. Look at the gold so it shows the words "Gold Bar" in bottom right corner. It is easier in first-person view. While looking at the gold bar, save the game, exit the game through the menu, then select "Resume Story" at the title screen (Pause Menu - Story - Save Game - Click Back - Story - Exit - Title Screen - Story).

5. You will spawn somewhere nearby. Return to the box, and the letter should be gone. There will now be unlimited gold bars in the box. Collect as many as you can carry (30 maximum, each is worth $500 = $15,000 total).

6. Sell the 30 gold bars at a Fence for $15,000. For example, at Emerald Ranch (nearest one).

Repeat steps 3-6 as many times as desired to get an unlimited amount of money. $15,000 is enough to last a full playthrough though. After completing the story, you get an additional $20,000, which is more money than you will ever need. So doing this once should suffice. If you wish to repeat the process, make sure you close and reopen the lockbox to make the letter respawn. Then, aim at the gold bar again, save the game manually, quit out to title screen, continue, ride back to lockbox, and pick up 30 gold bars again. Note: This glitch was performed on an unpatched version of the game. It will probably eventually get patched. To avoid not being able to use this exploit, either do not install new patches before using this exploit or delete the patches. You can avoid patches being installed by disconnecting from the internet until you are ready for the game to install new patches.