Christopher Nolan 4K Collection (4K Ultra HD + Blu-ray)
Amazon.it (Italy) has Christopher Nolan Collection (4K Ultra HD + Blu-ray) for EUR 40,98 (price drops during checkout) + 11,09 S&H = 52,07 or $60.99 USD. Thanks persian_mafia
Note, if you have a credit card that doesn't charge any foreign transaction fee, you may want to consider using that for additional savings. Refer to the forum thread for additional details and discussion.
Also if you have a credit card that doesn't charge any foreign transaction fee, use that card instead. You can purchase this for around ~ $58 shipped. Pay in Euro instead of USD. Comes to around ~$8.20 per 4K