Typically, the prices for Windows 10 keys can range from around $100 to $200 USD for the Home or Pro editions. However, please note that prices may have changed since then, and it's always a good idea to check the official Microsoft Store or authorised retailers for the most up-to-date pricing information. Additionally, Microsoft occasionally offers promotions, discounts, and special deals on Windows 10 licenses, so it's worth keeping an eye out for those as well.