One aspect of this could use some clarification. The OP said the presumed scammer said he lived in Spain and proposed a bank wire transfer.
Here in the US, bank wire transfers between individuals are rare and (as a form of payment with recourse) are cause for suspicion. But as I recall it's very common in Europe and that, in itself, might not be cause for suspicion.
Can our European members clarify whether these transfers between individuals are common?