Level, you gain access to higher level items to buy or sell. This way, players can’t ever accidentally invest in resources they cannot use or otherwise acquire yet.
For each item available in the Exchange Center, there’s a total supply to trade relative to its rarity. The refresh timer for the Exchange Center is applied globally for all players, and resets all tradeable items.
There are a few trade limitations for the Exchange Center. For example, you are able to sell both raw and refined resources, but the Exchange Center does not allow you to trade in
“The bustling sounds of economy and trade are heard even outside this massive structure. Like a convention of businessmen, the Exchange Center is constantly managing an influx and outflow of resources and people.”