Whether it is your first listing or your hundredth listing on eBay – there is no particular time for implementing the shipping best practices on eBay.
Have you seen our post that talks about “ Your Guide To the Shipping Best Practices on eBay”? If not, then visit the following link to know more : https://community.ebay.in/t5/Selling-on-eBay/Your-Guide-To-the-Shipping-Best-Practices-on-eBay/ta-p/...
Regards,
eBay INCBT Team