Black market

Usually whatever the server restricts or makes inconvenient on purpose: high-tier enchant books, spawners, beacons, crate or key items, banned potions, contraband tools, and limited event drops. Sometimes it is also bulk materials at rates you cannot get through public shops, but the defining part is controlled supply and gated access.

Most solid setups tie it to progression: a quest chain, prestige requirement, gang standing, reputation, or a rotating NPC with consistent hints. Word of mouth still matters, but there is usually a real path so new players can work their way in.

Not by default. The format feels right when the edge comes from knowledge, logistics, and risk management. If it is just a hidden cash shop, it stops being a black market and turns into another store.

It depends on the rules. Some servers allow scams as part of the social game, others enforce trade safety with escrow, confirmations, or trusted middlemen. Even with protections, smart players still do test buys, control the meeting spot, and avoid showing full inventory.

Prison is the classic home, especially with gangs, contraband enchants, and prestige loops. You also see it in economy survival with heavy restrictions, factions-style economies where certain blocks are limited, and lighter roleplay servers that want an underground trading scene without full RP.