When buying a high-value Odachi sword, consider blade quality, steel type, and forging method to ensure authenticity and strength. The Odachi’s long size demands perfect balance and craftsmanship, so verify weight distribution and handle construction. Look for reputable makers with proven expertise in traditional Japanese techniques. Finally, evaluate the sword’s purpose—display, collection, or martial arts—to choose an Odachi that offers durability, artistry, and long-term investment value.