Native Instruments (Kontact etc. for those that want and are willing to pay for top notch sounds) is offering all updates and upgrades 50% off!

https://www.native-instruments.com/en/

I should have posted this "compare" link for the "Komplete" series of bundles. They are the best value, and this gives you a good idea of what you're getting, the different update / upgrade prices, and the differences between the bundles. Not cheap, but a really good bang for the buck.

https://www.native-instruments.com/en/products/komplete/bundles/komplete-12/compare/

The individual instruments usually go on sale around Thanksgiving.

But if you're one of those people who have been waiting for Kontakt to go on sale, this is probably the yearly sale you've been waiting for.

Especially if you've got a Kontakt player library, because you might be eligible for a crossgrade.

I'd put off purchasing the full version of Kontakt library for years, but it's nice to have if you want to use some of those cheaper libraries that require the full version of Kontakt. Indiginus, Embertone and Fluffy Audio are some of my favorites.