The cost of a real, handcrafted katana can vary greatly depending on several factors such as the craftsmanship, the reputation of the swordsmith, the quality of materials used, and whether it's a contemporary piece or an antique.

• Low-end replicas and machine-made katanas can be found for as little as $50 to $200. However, these are typically not functional swords and are often meant for display only.
• A functional, hand-forged katana made in the traditional style but by less known smiths might range from $500 to $2,500.
• High-quality katanas crafted by well-known and respected smiths can cost anywhere from $3,000 to $25,000 or even more.
• Authentic, antique Japanese katanas (often classified as "Nihonto", the term for traditionally made Japanese swords) that are several hundred years old can cost tens of thousands of dollars, and in some rare cases, even reach into the hundreds of thousands.

It's important to note that owning a traditionally made katana might be subject to legal restrictions, depending on local laws. So, be sure to look into your local laws and regulations before purchasing. Also, if you are purchasing a high-value katana, ensure that it comes with proper authentication and certification.

Prices can fluctuate and change over time, so for the most accurate and current pricing, you should check reliable and reputable sword dealers.