Rules of Thumb for Negotiation? Options

[Voran]

I've wondering if anyone had some used or ideas for rules of thumb for Negotiation/Social Skills?

Like, Loyalty provides +dice to social checks, but I was wondering if there might be a way to better represent something like Fixer negotiations between chummers. Like that the old 4th edition series that has your group potentially run a series of missions for Bull, possibly resulting in things like: saving his life, finding his daughter's killer, finding the guy behind the fake-killer, etc and general business that can easily end up with like a 4 or 5 loyalty rating. It just seems odd to me that you still basically enter fee negotiations like strangers. Yes you have more dice and potentially more hits, but would something like, "autohits based on loyalty" for such things be too much? Representing that you know he's lowballing you, and there's always some sort of wiggle room, and you guys come to a default consensus ANYWAY, so why not just fast-forward the process at bit. Like if there's wiggle room up to 5 hits, and you're already at 5 loyalty with that contact, then they just offer you the max and don't go for more negotiation. If there's wiggle for 10 hits, you get a basic 5 hits free, then have to earn the rest via test, etc.