The cost or price of a "giant sword" can vary greatly depending on several factors, including its size, materials, craftsmanship, and whether it is a functional weapon or a decorative item.

If you are referring to a giant sword as depicted in works of fiction or video games, keep in mind that they are typically fictional creations and not available for purchase in the real world.

However, if you are looking for an oversized or larger-than-average sword that is based on real-world designs, there are custom swordsmiths and artisans who can create bespoke pieces.

The cost of such a custom sword can range from hundreds to thousands of dollars, depending on the complexity of the design, the materials used, the level of craftsmanship, and the reputation of the swordsmith.

It's important to research and find reputable sword makers or artisans who specialize in creating custom or oversized swords if you are interested in obtaining a unique and specialized piece. Prices will vary depending on the specific details of your request and the expertise of the craftsman involved.

Additionally, it's important to adhere to local laws and regulations regarding the purchase and ownership of swords, especially if they fall under any legal restrictions based on their size, design, or functionality.