Marvic wheels are sand cast magnesium, if these are aluminum alloy they are more likely to be Roin wheels if of European manufacture. Worth double checking when cautioning against purchase and questioning specs. But then from what you stated it sounds to be more your car than the wheels? There looks to be a lot greater tire stand out on the rear, almost appearing as too much toe in, has your car been accident repaired, have you checked rear wheel alignment?
What tires do you have on them? A wide bulbous side wall tire will make them stick out more.