[Shinto]

Here is what I know about this.

If you do a search by item name or seller, the broker normally works. Item level filters also appear to work. Those drop-down boxes are hit and miss.

If you put an item up, you must have the cost of the item in your inventory, or the broker will deny the request. You may only put 10 items up at a time.

Every once in a while, a player gets a real bug. He cannot see items that he put on the exchange, the searches do not work, and often the mail also does not work. Relogging fixes this.

It is worth noting that the exchanges are by continent only. You cannot purchase items from Thestra unless you are in Thestra.