Ancient weapons are seldom found intact. Most have rusted, or been damaged, or buried in bogs for centuries. Therefore, a recent discovery in China is pretty exciting news. According to Sina News:
Chinese archaeologists have recently unearthed a 2,300-year-old sword, discovered in an ancient tomb in Xinyang city, central China's Henan Province. It is believed to date from the period of the Warring States (475 BC -221BC). Amazingly it was still shining as an archaeologist pulled it from its scabbard.
Here's a video showing the sword being removed from its scabbard.
That's in amazingly good condition for a weapon forged well over two millennia ago. The Roman Republic was still a small nation at the time, and the Roman Empire had not yet been founded. Interestingly, its size and shape are reminiscent of the Roman gladius, or short sword.