The cost of a samurai sword, also known as a katana, can vary widely depending on several factors such as the quality, craftsmanship, materials used, historical significance, and whether it is an antique or a modern reproduction. Here's a general overview of the price range you might expect:

1. Decorative Replicas: Entry-level decorative replicas made for display purposes or for use in martial arts training can range from around $100 to $500. These swords are often made with lower-quality materials and may not have the same level of craftsmanship as higher-end options.
2. Functional Reproductions: Functional reproductions, which are designed for martial arts practice and cutting exercises, can range from $500 to $1,500 or more. These swords are typically crafted with better materials and attention to detail, allowing them to withstand repeated use and maintain their edge.
3. Custom-Made Swords: Custom-made katana swords, created by skilled swordsmiths or artisans, can start from around $2,000 and go well beyond $10,000. These swords are individually crafted to meet specific requirements and are often made with high-quality materials and traditional forging techniques. Custom-made swords may also have unique design features or historical significance, contributing to their higher price.
4. Antique Swords: Genuine antique samurai swords, with historical provenance and cultural value, can be extremely valuable and their prices can vary significantly. Antique katana swords can range from a few thousand dollars to hundreds of thousands or even millions of dollars, depending on their rarity, condition, age, historical significance, and the reputation of the smith who created them.

It's important to note that when purchasing a samurai sword, it's crucial to consider the reputation and expertise of the seller or dealer. Authenticity, quality, and provenance are vital factors to ensure you're obtaining a legitimate and valuable piece. Consulting with experts, reputable dealers, or professional sword collectors can provide valuable guidance when making such a purchase.