Looking for resources/links of some killer examples of copywriting for landing pages?

Copywriters tend to keep "swipe files" for that, if you Google for that word, you'll find many examples. Warning: many of them will come from copywriters in markets that you might find a bit too salesy/scammy — it doesn't mean that you can't learn from them, though.

If you want to find something that not only gives you good examples but explains why they're good examples, I recommend taking a look at some of the articles I wrote on Your Landing Page Sucks!

I also put a bunch of them in the Landing Page Cookbook. :)

You may find this super useful :)
https://swipefile.com/