Separate game countries for a more realistic value shown

Ps3 game values are unrealistic when you group together Australian, Italian, German and Uk etc pal games

They are all PAL but the values hugely differ, a rough and quick example is the PS3 game World Of Outlaws : Sprint Cars;  In UK version this game is very rare and has a value around £75-100 depending on completeness and condition. An Australian one is more common and in less demand with a value around £15. Those two versions of the same game are worth hugely different and should NOT be grouped together to show average value. That’s like saying US and Japanese games are worth the same when obviously not