Sean, I don't know if this is of much help, but James who runs Photospace here in Wellington is worth talking to on this subject, along with Paul McNamara in Wanganui.
One thing I am aware of is resitance to ink jets at premium levels. Though some photogs are getting good prices for them (and crossing their collective fingers on archivale issues). There seems to be a belief that trad silver prints are more "collectabile" than inkjets, which pleases me as I print on Azo. On the other hand, the people I work for, who collect New Zealand art, don't seem to care what the medium is. If they like the work they buy it.
Buy the way, nice shot from Makara, thats a good climb up there. Was it at the gun emplacements?