Armory Rusty Arrows were the standard weapons of the NPC army. They were manufactured in bulk and stored in the Armory. However, they rusted because of the poor storage conditions and their durability and attack both fell. This didn’t make much of an impact because they were still a lot better than the average Fine Steel Arrows.
A bundle of these arrows costed about 20 silver, which came down to about 2 copper each. This was much more expensive than the cost of making normal Iron Arrows. Therefore, many people were reluctant to use these arrows.
Lu Li picked out the Armory Rusty Arrows and bought the bundles that were listed at 20 silver or less. He ended up with 9 bundles of arrows.
With 10 or so gold left, Lu Li continued browsing but did not find any other rare materials. However, it was not necessary to search for rare materials to become rich. Even trading the most average materials could make big money.