Here's a good deal -- if you have an Amazon Prime credit card, get 25% back in points when purchasing digital credit gift cards for Xbox, Playstation, Nintendo, etc.:
On Amazon, there were some crazy discounts going on (A $3.80 instant coupon and $7.98 Prime savings). I picked up UHD's of BLACK HAWK DOWN and GLADIATIOR for $13 each.
I grabbed the Mission: Impossible 4K set for $50, as well as the 4K releases of Tim Burton's Batman and Spielberg's War Of The Worlds. After the last one was free, and with $10 in Amazon credit from a recent in-store book purchase at the Amazon store near my local theater, it cost about $74 after taxes. Less than $10 per 4K movie does it for me.