[Maerlande]

I kind of had to learn this too not long ago. 1:1 is pretty common for most gems but it's tough to buy astral and death that way since there are a lot of value in them. It's also hard to spend fire. But of course, it's supply and demand. A nation that needs a lot of death gems and has bad luck finding them might pay a premium.

Slaves seem to run about 3:1 or 4:1 for gems. Because there is really no limit to how many slaves you can get if you are a real blood nation. So it's pretty cheap to buy a few slaves and get started.

Items are usually priced a full minus a very small amount for hammer discount. However, folks want a small profit to cover the mage time. So 13-14 for a hammer seems common.

Just my 2 cents but I'm not the most experienced.