Found a link on reddit this morning that led me to interesting information on the The Nik Collection (now) by Google.
Short version is that the full collection is now $149 (or if you use DZISER on checkout you can get it for $126.65 USD) instead of the previous $499.
Even better if you have even one of the previous plugins, you get an upgrade to the entire thing free. If you’ve ever seen some beautiful black and white you will want it just for Silver Efex Pro. There’s a 15 day free trial if you want to check out the software first of course.