ResellKit is a simple to use cross-listing app designed to increase your productivity, Start using ResellKit for FREE, No credit card required.
Cross-posting items have a cost. The time you spend to manage and track cross-posted items. With upcoming auto-delist feature of ResellKit you don't need to remove a sold item from other platforms.
The software is suppose to look for sold items and de-list cross-listed ones in other platforms. With this feature you won't need to worry about receiving multiple orders for a single item.
First list your inventory with your favorite platform. Once your listings are in that platform you can cross-list them to other two platforms in bulk. In the process you can review what will get published.