There are actually some oké items there to start building a set, use the EE swords with the EE armors and Strength charms. Still many items missing for a full set so you’ll need to buy some.
You can mule items by going to the Marketplace and using the Transfer tab. And no, there’s not a bug in the Marketplace, guess you did something wrong.
Feel free to PM me with any questions, will answer them tomorrow.