RealEstate is a spigot plugin built on top of GriefPrevention to provide players with an ability to sell and rent claims to other players.
The plugin is documented in the GitHub wiki.
Please feel free to report any issue in the GitHub Issue section.
This plugin is dependent on GriefPrevention version 16.18 and up.
GriefPrevention plugin can be found here
This is just an update to work with 1.21, I am not the originator of most of the work in this plugin.