Hello, thanks for running Brighter Worlds!
For the conversion guidance, I do need to take a second look at those. Under the original combat rules stats were far more comparable between Cairn and BW, but now characters are much more fragile at low STR, and much more durable at high STR, so I’m not yet sure how I want to tweak the guidance for converting Grit. If you find yourself consistently feeling that using Cairn HP as Grit is too much that’s good information.
Writing a price list is one of the last “big” chunks of the game I haven’t done yet. So your want of it is very reasonable. If you’re looking for something short term, I’d recommend looking at the equipment prices in Electric Bastionland, which is usually where my head is at about these things.
For armor specifically, my eventual intent is that any single piece of equipment that provides 2 armor should have some sort of drawback or limitation (outside of stuff produced by Calling abilities). I plan to have a number of examples for this, because as you said high armor is very useful so it’s going to be in high demand.