I would say they cannot be called experts :)+Naji Issa
you're right, oil older than 1 year is not good anymore, even 1 year old oil is less priced (because less good).
I think I misunderstood your sentence... even the best oil is not very good after an year. BTW it's not bad, but not as good as first year.+Robin Pierce
it's a little unfair to blame Italy. This happens everywhere there exist a large business. I could write terrible things about oil all around Europe (or Nord Africa). I agree to buy on your local market, it's easier to check for quality and price.
As with everything, experience helps. If you lack experience, then ask someone you trust.