I don't do a lot of "tire kicking" on Craigslist. If I'm going to show up, I probably want the item, and have cash in my pocket.
I have done a couple of "meet me in the middle" deals. I guess I'm not going to have someone drive to meet me, and not complete the deal. Nor would I have them drive to meet me, then try to change the terms of the deal on them.
Maybe I don't represent all the buyers. Should I consider the seller to be vulnerable after diving to meet me, and beat them down on the price after they have already gone out of their way to make the deal in good faith?