To anyone considering this - Always use escrow from a trusted third party. If the seller doesn't accept escrow, or you don't personally trust the third party, be smart and walk away.
To the seller - can you post the address(es) where the bitcoins are stored, and sign a message (ie "I am email@example.com
and would like to sell my bitcoin for ...") , and post the signed message here? Then I know you are serious, and I may consider.