This plugin helps you to have a marketing system in your server
You can buy/sell items with a GUI menu, send money to someone, and if you are an OP, you can add free money to anyone

First, as an OP, you need to use /marketing_freemoney all [amount] to give money to everone because default starting money is 0$

You can sell items by using :
And you can open MarketPlace menu with :
You can send your money to your friends with: