Said the guy selling God knows what who knocked today with the worn-out "We have a truck in the neighborhood and more supplies than we need, so . . . " pitch.
I politely informed him that we don't buy anything door-to-door but we'd be happy to consider a mailed offer (without launching into the more aggressive "The only purpose of door-to-door soliciting is to deny me the opportunity to properly assess the value and worth of your product/charity/political party") whereupon he instinctively responded with the response above, most likely right out of the training manual.
Time to buy a NO SOLICITING sign and rehearse my "You're obviously not illiterate so I'll presume you're just an a**hole" retort for the courtesy-challenged.