Amazon Italy are offering 4 x 3D Warner Bros blu-ray movies for €16 which averages around $30 (give or take 20 cents depending on weight) with shipping to US total.
1) Add four movies from the above deal to your cart.[amazon.it]
2) Use promo code '4X16WB' at checkout (you can login with your US account).
3) If you have a credit card with free foreign transactions, you can choose to checkout in euros for a small additional saving.
Example of confirmed region free blu-rays in the sale: