When I inquire about buying a domain name, I do so through my Embrace.com email address. The recipient of my email may have never heard of Embrace.com before, but I believe there is some level of authority and trust with the Embrace.com brand name. Establishing trust is important to getting a deal done. I think emailing from my @embrace.com email is much better than from my @gmail.com email address.
In my standard purchase inquiry email, I include several pieces of information to further establish trust with the recipient. The information is passively included in my signature, and I think it helps to give background about me and show that I am a credible buyer should a deal be made. The information I include in my signature:
