Margin
The difference between what you paid for an item and what you sold it for, after fees and costs. Gross margin = sale price minus item cost. Net margin = gross margin minus all fees and shipping.
Where you'll see this
This term is commonly used on:
ebaydepopgrailedfacebook-marketplace
Put this into practice
Shopfront handles the hard parts of crosslisting and inventory sync so you can focus on finding and selling.