Trade+

Trade+ is a high quality, easy-to-use and -setup, lightweight trading plugin. It allows your players to send trade requests and trade items and other configurable extras, such as economy money via Vault and XP, through an aesthetically pleasing, highly configurable GUI.

Made by Minehut user Lucas.

Plugin Link:

https://www.spigotmc.org/resources/trade-3-27-%E2%9C%B1-fully-featured-high-quality-trading-plugin-%E2%9C%B1-1-7-10-1-14.23138/