[militarist]

Hello.
Is there any standard ingame exchange rates between players?
For example if I need to buy blood slaves, and have gems, how much is it reasonable to propose? What exchange rate is to look for?

I understand that any game is unique, but still maybe there ara any commonly accepted bounds between goal and
Is there any standard terms I could try to get and reasonable terms which worth accepting if there is not much choice?

And for gems - is rate 1 to 1 is usual, or various deviations happen frequently and some gems are valued higher then others (for example death gems?)

P.S. As example of "usual" deals I mean selling dwarwen hammer for 14 earth gems, etc