ancient/gothic are shoppable. Dusk/archon are arguably the best because of the str requirement/defense tradeoffs. Because of this they are most likely to be in the botter's pickit due to how easy it is to sell them. The customer base for a jewelers sacred armor is basically zero, so a botter is never going to pick those up (I'm sure there is an exception). Frost variants are somewhat hard to sell, so I'd expect it not to be common in a botter's pickit, but some of them pick it up. You'll have to pay a ton for it mostly likely if you get from someone like onair. Best to just keep your eyes open and find that random thread that pops up from a manual farmer that happened to pick it up... or use the site that must no be named.
Yeah, good info.
I have a thing for Loricated which may prove extremely difficult.