What to get next - archer

[Nka19]

and how much do these items cost?

Hm, don't remember the actual prices, I'd say a million minimum for each item you want to upgrade. And that being brass armors like gauntlets and boots.
Royal Scale is around 5mill I think, Elmwood arrows 7mill up to even 10mill if you count how hard is it to craft it, Eastern Katana is around 20Mill, barrel around 5mill, the elmwood/ebony bow should be around 3-4mill I believe. And Ullrs Bane, well that's totaly up to the person selling it, some say they would sell for 25mill, but this really is people who are bad at archery, I myself own this bow for a long time and I can say it's fairly worth around 35-40mill. I love it and wouldn't sell for lower then that.

Edit: ah, and worm bane, that is around 750k up to million, sometimes you can find someone to sell it even lower.