FTB Money (Forge) Mod 1.12.2 has released money, shops, along with trading capability into the game. It’s free to learn how to use and mine their features here!
FTB Money (Forge) Functions
It is a very WIP mod. You should avoid using it in mod packs until it has more features. However, it doesn’t violate anything if you add it with FTB Quests.

The main additions are money, shops, and trading.
How to utilize
Choose /money to view the current balance, /pay to pay somebody
/shop and /trade are WIP. You can turn them off.
OPs can deploy /setmoney to reset the player’s balance.
At the moment, you can only launch it with FTB Quests in rewards and missions.
FTB Money (Forge) is a server utility mod that asks you to install Minecraft Forge to work. If you face a bug where the money disappears when you die, please relog in the world/server!
How to install FTB Money (Forge) Mod:
Assure that you have already installed Minecraft Forge
Define the location of the Minecraft application folder.
On the windows, open Run from the Start Menu, write %appdata% and click to Run
Open Mac on the finder, press and hold Alt and click to Library on the peak of the Menu Bar. Open the Application Support directory and look for Minecraft.
Put FTB Money (Forge) Mod you have already downloaded (.jar) into Mods directory.
When you start using Minecraft, open the mod button, you will realize that FTB Money (Forge) Mod has been set up.
Screenshots