If someone walks in to sell us their collection, we want to be able to decide to issue a buy order for the cards we get on the fly. We don't want to have to go into inventory, add the number of x card that the customer brought in to the buy quantity, wait 3-10 minutes for the POS to catch the update, then go back in and remove the opt in quantity after the buy. This creates a lot of unnecessary work.
Also we can verify what we are selling and since the system will allow selling negative anyway why does it not allow selling anything when there's a 0 quantity. It should automatically allow selling manually. Maybe add popups saying "are you sure" or a switch to allow or disallow this ability.
We're having customers waiting for us to go back and forth adding a card to inventory then waiting for POS to update before we sell or we sell them through the custom line item and can't track trends in sales.
