Thank you mister. Somehow, i suspected it was Steam's fault. Whenever i hate something or someone, my instinct and intuition is always outstanding, legendary, ice cold, well placed right on spot. Too bad that i really need to deal with the service i hate, damn... Well, i will try to find someone to trade, then. Thanks again.

That damn Varoufakis needs lynching. I dread to imagine what impression he left those people with over there at steam, so that they decided to not deal with any other greek, from then onwards.

UPDATE:

After a multitude of failed attempts and a phone from bank at Athens (during which the representative told me the inability of the transaction to Steam to occur)... I simply decided right now, on a whim, to try once again. Expecting a failed try, as usual. This time round, though, i used the browser to log in to steam, not the client, to attempt the purchase. And miraculously, it was DONE! Case closed! Finally! At last!