There is an orange chest in the room next to the shop on the Nexus. Open it, take all but one item, save, and then reload the save. The orange chest will be restocked. Repeat this exploit as many times as desired. You can get high level weapons from the orange chest. Note: It is highly recommended to create a save before starting this exploit, just in case you accidentally take all the items from the chest. Additionally, this exploit was performed on an unpatched version of the game. It may eventually get patched. To avoid not being able to use this exploit, either do not install new patches before using it 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.