When buying a Samurai sword, consider the blade material, craftsmanship, and purpose—whether for display, martial arts, or collection. Look for high-carbon steel blades for durability and sharpness. Ensure the sword is hand-forged for authenticity and balance. Pay attention to the tang; a full tang blade offers better strength. Examine the hilt (tsuka) and guard (tsuba) for quality and comfort. Research reputable sellers known for traditional craftsmanship. Additionally, check if the sword comes with proper maintenance tools and a protective sheath.