Why is it hard to find Guitar Hero instruments?

Finding Guitar Hero instruments can be challenging primarily due to the game's decline in popularity and production halting after its peak in the late 2000s. Many retailers no longer stock these items, and as a result, they are often only available through second-hand markets or online auctions, where prices can be inflated. Additionally, the specific compatibility requirements for various consoles can make it harder to locate the right instruments. Collectors may also contribute to scarcity, as they seek to preserve these nostalgic items.