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Amazon.co.uk offers The Ultimate Bourne Collection on Blu-ray Disc for $13.35 (£6.60). During checkout, it falls to $11.14 (£5.50). With $7.25 (£3.58) for shipping, that's the best price we've (DN) seen. (It's also a current price low by $8.) This box set includes The Bourne Identity, The Bourne Supremacy, and The Bourne Ultimatum.1
This Blu-ray set is region-free and the films themselves will play on NZ Blu-ray players. It also has an expected delivery date of 7 Nov 2014 - 18 Nov 2014.2
Next closest price is OzGameShop - $26 delivered (~44% difference in price)
WowHD $71!