Hello Aternos Team,
While this mod may not look popular, It is made by MrCrayfish who also made MrCrayfish's Furniture mod, Device mod, Vehicle mod and Backpacked. And you already have them in the system. He made this mod just 2 days ago sadly it is not popular yet. But since you guys already have his other mods in the system I thought maybe you could add this as well because it is just so simple yet amazing mod and would like to add my server.
Link to the mod: https://www.curseforge.com/minecraft/mc-mods/goblin-traders
Goblin Traders is a mod that adds a trader similair to Travelling Merchant but instead of surface he is down there, inside caves. Has very low chance to spawn and can give some stuff that is not easily acquirable or non-acquirable at all (like enchants that is more than max you can get).