There is no price for the Wrestling Mpire HD game. I've checked the official website along with other found on Google and it's indicated that the Wrestling Mpire HD is actually free. You can download and install it. For newer versions of Windows, right click the installer and choose Properties > Compatibility. Select a previous Windows version (eg. Windows 7 or XP) and then run the game.
This setting will increase the chances of running the game even on unsupported Windows versions.