Now eBay has increased the "invisibility" of the email addresses of the buyers. Time ago You were able to see the email of Your current highbidders, now it is not possible anymore, then it was yet possible for 2 weeks to see emails of Your current winners of items via listings table, then this information was hidden in Your "My eBay", then after appearing of widely hated eBay-BETA it was closed there too. So now You can legally obtain the contact email of Your items winners only with automated eBay message to Your email called Your eBay item sold! so what You can do is to store these emails or write the data out. I hope this is useful for many sellers.