Hi. I'm Chilean (just like Alfonso) and I'm lucky enough to not only own one of his beautiful basses, but to know him as well.
I'm currently waiting for a second Iturra (a fretless this time), and planing about a third one.
A week ago or so, he finished another Mini-bass for a traveling bassman. The mandatory [Invalid or Expired Link Removed]
Fact of the mater is that Chile is a long country and people tends to travel a lot. Those basses are thought to be carried in a regular sized backpack and I know Alfonso puts special attention in making those bases sound almost like their big brothers.
I don't know if I can put some prices here. I know that The Low End distributes some Iturra basses, yet I don't know what kind of agreement they have in this respect. But you can always PM.