Conning people is a national pasttime in Spain, this applies as much to those offering goods as it does to those buying. So put together one party offering something for nothing and another party who thinks the seller doesn't know the value of what they have and can get one over on them and you have the ideal location for fraud.

If 76 people really made three billion Euro, I am going to give up moonlighting as a taxi driver. Ebay here I come - heck I´d probably only get a suspended sentence.

they managed to nick 3 million euros, not 3 billion.

did some bank phishing and posed as "hacienda" (spanish inland revenue), not just ebay stuff.

by the looks of it they also mimicked ebay's pages too.