Damn it. I'm in Auckland. It seems all the good stuff is down your way. A lot of the trade me seller are . However, I did buy a mint condition Klein pinnacle frame on trade me from CrCh last year.
It possible that it is still salvageable. If you took it to a machine shop they could put it on a milling machine table and bore the old seatpost out. I removed a very seized seatpost in a ti frame by making a split collared bearing puller. I then attached a slide hammer to it and hammered it...
I'm just north of Antarctica (New Zealand) so postage would be astronomical and then the marfia leeches ( Government) would want their cut for some stupid reason
That's what I told my wife when she complained , I just asked her "would you rather me spend money on booze, gambling, drugs and hoes" and then she never questioned again.