If you rely on the free listings on Ebay for fixed price items, beware of a new policy taking effect in March.

All fixed-price listings will become "good 'til canceled." Every 30 days they will automatically relist, and will count - every 30 days - against your free listings amount. If you want to avoid this, you will want to cancel the listings on the 29th day.

https://pages.ebay.com/seller-center/seller-updates/2019-early/index.html