Apple iTunes is having a 5-film 4K UHD bundle sale on the following collections. $19.99 each. Not MA compatible. The landing page for these links might say HD, but they are 4K when you search:
Underworld Ultimate Collection:
Fanflix is having yet another sale - 4 for $20 on past Oscar-winning films/actors/directors:
It's a good selection of films, all redeemed via Movies Anywhere.
Wow, sorry guys. I found this deal on Slickdeals.net, so it was not a targeted offer, and I was able to purchase it for $1. It's been up on their site all morning. Are you sure you're logged in to your Amazon accounts when viewing the title? Anyway, my apologies.
Other than the potential for quality issues, this is the biggest drawback to "owning" streaming content IMO. The content provider can choose to alter any title at all, for any reason, and there's isn't a thing you can do about it. The situation Ken describes with Deep Red appears to be a perfect...