Private Messaging

From the home page-upper right corner hit the message icon, and you'll see the link at the bottom of the page. Member lookup-message from there.

Audiogon - The High-end Audio Community

Or, find a post he wrote, click on his username, A drop down box will  appear that says 'message user'.

I click on the moniker and then marketplace feedback (the message function is there if allowed by the user).

DeKay