Andy: When I see DG I don't wonder where they're from, I think flaming Lawrence liberal
Cricket: I hope you know I was just pokin' you in the eye. IMO, it's best to take a more direct approach. If some dude comes to my door, I want to know why he's there fairly quickly. If I get a letter full of praise, I wonder if it's sincere.
I'm probably jaded, because I get 'sold' to all the time, and have for more than 20 years. To me, the best salesmen are the best listeners, not the best talkers. They listen, learn what's important, and work to get me what I need. They build trust through their actions, not through their words, and that takes a little time.
So, getting back to the topic -- I'd most likely go to the door and just be upfront about what I want, and let the conversation go from there. If the guy looked pissed I was even there, and gave a quick no, I'd probably apologize for the intrusion and move on. If the guy was open to discussing it, I'd let him talk and try to learn what he expects or would like from me.