Here’s how to list a new item you want to sell directly in Mana Pool. For importing larger lists all at once in a CSV import, see here for details on available formats and process.
 

• Click on your Profile image and go down to Inventory.

• Click on Add Item.

• Start typing the name of the card or other product you’re hoping to sell. Click the name of the product you want to sell. 

• If you’re listing a card, check the set symbol as well as the Planeswalker symbol indicating your copy is from The List. Click on the appropriate version that matches your product.

• Study and fill out this page carefully, including your card’s condition, its finish, the quantity you wish to sell, and the price at which you want the buyer to pay. You can use the dropdown(s) to only see other copies already for sale that match your own to set a fair price.

• Enter that final price when you’ve settled on it, which will make the Add button interactable. Click it to Save the price and send your listing live. If you have more cards to list, you can search the next card’s name via the search bar above “Save All”.