Money and Trade in the Planes

Money gets a little tricky on the planes as most don't recognise material plane money as a way of paying for things.
Sigil is known for its trade and its more material plane friendly. Some levels of The Abyss and The Nine Hells takes money instead of other trade. The best way to not die is to ask how they buy things.
Trade- most places do some form of trade, like trading old items for new ones.
Souls- these are the souls of people who died, more on that in another article.
Memories- memories are highly sort out because there is personal information that can be used against you, also the person giving the memory away has no control over what memory they lose, so be careful about who you give your memories to.