Hey mkenyon2,
They probably aren't going to spend a lot of time with you discussing a $6k trailer.
Is this very far from you? Can you swing by and see it in person?
Are you experienced enough to inspect it yourself to figure out all of the options and see where the bodies are buried? If not, search for a mobile tech in your area and see if you can hire him/her to spend an hour or two going through the rig for you. It would be money well spent, plus it might give you some negotiating points.
It's a sellers' market right now, so there's no telling how much time they'll be willing to spend with you on this sale.
Good luck! :)
