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In TESO, there are no public broker or other markets. You only have guild stores. You have to be a member of the guild in order to purchase from the guild store. The only way to purchase from other guilds, is if they take over a tower in PVP area and set up shop as long as they control the tower.
This whole idea frustrates me.
In many games, guilds are meant to group people with like interests and willingness to help each other. In most guilds that I have been in, we generally don't charge other guildies for items, unless they are super rare (an even then we give sharp discounts to each other). A market of similar technique was only needed to sell items to people outside your guild.
So, why make the market limited to only your own guildies?
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Pigglesworth @ EQNForum.com, MMORPG.com, EQNextfans.com, ProjectNorrath.com, & EQNFanSite.com
Malcontent @ EQNexus.com & EQHammer.com