It's one thing to have the option of trading money for time, it's something else entirely when the overpriced NPC is the primary source and the items can not be reliably made yourself.
Also, got another for the list.
Today's Leathercraft item for me is Bison Gamashes, which require 2x Hippogryph Feathers... I know from experience that these things are painful to farm and average ~12 per hour of solid killing assuming zero competition. (I've even put in a rejected bug report on the Gates hippos having worse droprates than the ones in Grauberg.) I'd honestly prefer it if the drop rate was simply raised for at least the Gates ones, but alternatively, please replace Bison gear with something else.