Does anyone know if there’s a way to make a specific item sell always at a static price to vendors? Like FNV currency…

[funhammy]

Does anyone know if theres a way to make a specific item sell always at a static price to vendors?

 

I am trying to make a currency mod and I want just the currency to always trade at 1:1 since a 20% conversion both ways seems wayyyy too steep for using them for barter.

 

Anyone know how I could set specific set of items to 1:1 while leaving the rest of the game how it is?