Such adivce you could find in reviews. We just share some from our experience. 1. ebay-site map- Set up my Buyer Requirements Preferences for example: Are registered in countries to which you don't post to Have a feedback score of -1,-2,-3 or lower Have received 2 Unpaid Item strikes in the last 30 days Are the winning bidder on 1-100 of your items in the last 10 days. (Note: This block will apply to all buyers, regardless of their feedback score, or you can choose to only apply this block to buyers with a feedback score of 0-5 or lower.) Don't have a PayPal account 2. ask the buyer or bider with 0 feedback if he really need this item. if you feel he is suspended, please cancel his bidding and put his id in Blocked Bidder/Buyer List 3. don't send item in advance 4. don't ship to Africa. 5. For large value items, please USE registed airparcel and record the tracking number in paypal.