The price of a Michonne's katana replica from the television show The Walking Dead can vary significantly based on a number of factors including the quality of the materials, the attention to detail in its construction, and whether it is officially licensed merchandise.

A high-quality, officially licensed replica of Michonne's katana might range from $100 to $300. Lower quality replicas or unlicensed versions could potentially be found for less.

However, please note that prices can fluctuate over time due to supply, demand, and other factors. To get the most accurate and up-to-date pricing, you'll need to check the current listings on reliable retailers or auction sites. Always remember to verify the authenticity and safety of the product before making a purchase.