Some shops require you to download a "configuration file" or a "map mod" to trade. These are almost always Remote Access Trojans (RATs) that steal your Minecraft account and crypto wallets.
These are the premium packages, usually costing Gold Blocks (or a large stack of ingots). 9b9t kit shop
Join our server: discord.gg/9b9t-kits (example — replace with real invite)
Or find us in-game at X: -5000, Z: -3000 — look for the obsidian shop with glowstone letters. Some shops require you to download a "configuration