There were some more rules for those buying and selling, for example any items unclaimed after one week would be taken by the trading post, if an item does not sell after a month and the seller does not return to claim, it would be taken by the house. Any auctioned items that didn't meet the minimum price the seller asked for must be retrieved by the end of the day or it will be forfeited, items that are to be auctioned can be put in the advertising section for no more than one month, during this month if the price of the seller is met the item will be treated as sold normally, however if the item was not sold and failed to reach the requested price, it must be collected or it will be taken by the house, any item that is paid for but not claimed after one week will be taken by the house.
Rules like that were meant to stop people from using the trading post as a warehouse and leave their items there unsold and unwanted for a very long time, it was also an excuse to help clients to abandon items with questionable origins, the clients may also abandon items after they fail to sell, especially for items that would cost only gold, for those, Yunan asked for a team of bankers to be present in his private dimension to handle such transactions, and to even make matters easier for the membership ring users the ring will be the identification of the person, meaning that when a purchase is made through the membership rings one does not have to go to the guild bank to make a transaction, it would be done automatically, granted that the buyer had enough money in their account.
Yunan was even thinking about introducing a surrogate currency that can be bought using gold and can be used in the trading post's internal banking system, this virtual currency can be converted to gold or materials at anytime, but that would be left for a few years down the line, it was an innovative solution that required trust and respect to be functional, very much so since it was a monetary system that had real tangible value, even if the currency was not.
As for the location where trading can be done, it was a newly created section in the private diment, that offers anonymity and privacy for the two sellers, there were rooms that can accommodate any type of transaction, there were even bankers on demand waiting to serve at any time. The buyers and sellers would only need to stand in a cubicle to be teleported to a room where they can privately browse or showcase their items, when two rooms make a deal they are joined and the trade can be performed. These rooms were free to use with only mana syphoned from the occupiers to guarantee no magical harm, any harm done to the room would blacklist the user for sure.
For those who do not wish to enter any room and only require gold payment, they can be served directly by the two receptionists, the same for those who wish to withdraw items and those who only wish to deposit as fast as possible. Another rule was that any and all items that will be traded in the trade post must be inside a storage ring, the item can only be verified by the buyer or in the case of the house, the genie will do that.
Counterfeit goods were strictly prohibited unless stated as counterfeit goods in the description of the item, any item discovered to be fake after it was deposited will put a mark on the client, 3 marks and the client is blacklisted for ever, all items that are proven to be counterfeits that escaped the notice of the system will be fully reimbursed and the seller will be blacklisted immediately.
Blacklisted clients can appeal to the house to lift the status from them, otherwise they will be removed automatically from the blacklist after 10 years, all clients that fail to succeed in appealing to remove this status three time will be permanently banned from the system. All successful appeals will afford the client an apology from the house and a compensation depending on the the harm done to the client.
There were many rules to be observed when trading in the post and can be viewed anytime from the terminal being used, the most important rules were explained to the clients by the two receptionists, who had the ability to waive off some rules if they could serve clients faster that way, however, most rules were not to be waived or bypassed at any moment, the risk was permanent ban instead of blacklisting.
It took Yunan and his team a week to write these rules and make the system work as intended, all that was left was to secure a circular zone with a radius of 1000 meter, this center of this zone would be less that 50 meters away from the staircase leading up and down the dungeon floors, turn the zone into a no combat zone and make it a syphon mana zone, building the location of the post was the easiest part, the only needed the genie to design a place for them and just take it out later on and place it in the safe zone.
The negotiations with Hephaestus about the safe zone did not last long and ended fast as well, Tartarus asked for 30% of the mana gathered by the post as a total in order to provide the safe zone and make an announcement for all adventurers who reached the 80th floor, even those retired in the outside world, Yunan was about to agree but Hephaestus lowered the amount to 10% and to be allowed use of the spiritual cave and Lava wine whenever he wanted. Yunan looked at him like he was missing something and said "who stopped you from going to the cave or from drinking Lava wine? You are our friend, those come with the title, the food, the parties, tye drinks, the use of this dimension and anything inside it, you are welcome to at anytime, i feel hurt you know"