Liveconsultant
http://www.liveconsultant.com/

"Knowledge on demand"

This site's designed for consultation in real time.The client can pay an hourly rate because the site clocks your online private consultation on its chat engine.

Instead of running an auction it just handles the billing. It has quality assurance supervisors on staff to interview, test, and provide certificates.

You can't browse a list of contracts proposed or completed, nor even a list of contractors or clients.

Prices are negotiated by both parties and not published.