The first job will be to persuade the manager that you aren't a nut job. Once you have done that, agree a price & time. Offering to send a deposit very early on in negotiations should get their attention!
Don't expect more than a mix.. (Hoping that they will pass your music around to A&R folks etc) If you start in with that shit they WILL think you ARE a nut job!
A simple statement at the end of the session, "feel free to play it to anyone as I am looking for a deal" is about all that you can ask.
Also don't expect to be allowed in for the mix session until the 'comments phase' at the very end.. Many folks don't like to be watched while mixing. (as they spend most of the time eating delivery sushi, picking their nose and surfing on Gearslutz)
Good luck!