Hi there. Unsure if anyone is aware that if you purchase books from Book Depository and you have a VPN, you can often save significant amounts of money if you login to the site with your VPM set to anywhere in the United Kingdom - compared to the NZ version of the site. It does require you to view the webpage using an "Incognito" browser window and NOT be logged into your to view the prices in UK Pounds - but often the discounts are higher and the RRP is often cheaper too. Simply add the items to your cart then login to your usual account for payment. It adds on the GST at this point, but the discount price still remains! And of course it is still free shipping. I know it is not ideal to forsake local booksellers, but check it out and see if it works as well for you as it regularly does for me. :)
Brief yarn about it here:
https://www.cheapies.nz/comment/135548/redir
Thanks for posting OP.