Prevent a buyer from buying?

[salukidon1967]

Ok so I went into "selling"  and then what?

[dbfolks166mt]

There is not enough information in your question to provide you with an answer. Are you asking how to add people to your blocked bidders list? 

[fab_finds4u]

To block a buyer go here

http://www.pages.ebay.com/cz/en-us/services/buyandsell/biddermanagement.html

[dbfolks166mt]

BTW you asked almost the same question 3 times in different posts.