You should know because you were selling an email list of like 20,000 "rich people", right?
I suggest that you read all the stickies on this forum before you conduct any trades with anyone.
There are a lot of scammers on this forum. You do not want to get defrauded by them. Trust me i have been scammed before and it is a really really bad feeling. Use escrow. Trustworthy escrows include monbux, SebastianJu and Blazed. However don't trust them with too much, try to always use multisig because we all know what happened with Master-p....
Thanks for your support yes i have posted my 1st selling 20000+ emails list on bitcoin talk... but i need help about how i can safe from scamers and how i can increase sales here and how can i build trust of members for best services
Using escrow will give the both parties being scammed.