As a seller, you can take the following poin to note to ensure that your experience is successful.
Create and Manage carefully

1.Creating and managing your listing

2.Represent the items you are selling fairly and accurately.
3.Clearly state your return policy in your listing.
4.Respond promptly to buyer questions.

Review your buyer's feedback.
Use extra caution with unknown or new buyers and unusual bidding activity
Avoiding Unpaid Items

How to significantly reduce the rate of unpaind article
eBay's research has shown that following a few simple tips can significantly reduce the rate of unpaid item

1.Make it easy for your buyers to pay by offering PayPal.
Include detailed shipping and handling information in the item description as well as the shipping details area.
2.Use eBay's Checkout feature to make it simple for buyers to pay you.
Use Immediate Payments for fixed price listings and listings using the "Buy It Now" option. After the listing ends
3.Ship with a tracking number and insurance. This can help resolve disputes in cases where a buyer claims to have never received an item or received a broken item. Maintain records of shipping receipts as proof that the item was shipped.
4.Keep copies of any proof of your item's authenticity.
Verify payment before shipping items (including holding checks until the checks clear).
5.Learn to recognize counterfeit cashier’s schemes.
Only ship items to the verified billing address on the buyer's credit card account (if applicable).
6.Use extra caution with international payments and revised shipping information,
If you believe a buyer purchased or attempted to purchase an item with intent to defraud, please review the information on the Receiving Payments page to report the buyer.

7.Consider using an escrow service for high-priced items

Tips for International sales
1.With a PayPal Premier or Business account, you can accept credit card payments from buyers in many countries.
2.If your preferred payment methods aren’t available internationally, add other payment options that attract international buyers.
3.If you're passing the shipping costs on to your buyers, review Shipping Internationally rates and use the shipping rate calculator to estimate shipping costs.

4.Let your buyers know if there are any duties, taxes, or additional fees such as insurance.
5.Make sure buyers know that packages will pass through customs, and that they should investigate any costs that might be involved

6.Due to potential for fraud, Ebay don’t allow buyers and sellers to complete sales outside of eBay. These sales are not eligible for Feedback, requests for contact information, or eBay's problem resolution services. ebay will not responcible for any transaction in that case