How to buy and sell miniatures
In spite of the name of this site, you can do many more things than trading miniatures in it. One of them is buying and selling miniatures to and from other users.
This is very simple, it just means exchanging miniatures for money instead of exchanging them for other miniatures. So you can use the Tracked Trades system normally by entering items to be sent by one of the users and none by the other, and adding a cash exchange where the latter sends money to the former.
For example, if you want to sell your miniatures, you can send a Tracked Trade offer to another user who wants the miniatures you have and indicate that the other party will be sending money for the price you want for those miniatures. If the Trade gets accepted, the process is the same as with a normal one, only that, when it's the buyer's turn to send, they should transfer the money to you.