Is it possible to find a Harry Potter Psx game or an iso in a good state nowadays?

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I've been wanting to play the 2 games released on the Psx for nostalgia sake. However, its almost impossible to find an used copy who doesn't cost a fortune or isn't in bad shape. Not even isos are perfect, since they usually lag when you play the mini games.
Is there any way to play this game, all the way to the end, with no problems?

submitted by /u/Time-Patrol_Goku
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