I find many things hard to resist.
I have purchased a complete Encyclopedia, a Kirby vacuum cleaner, and even almost signed up to become Mormon.
All somebody has to do is to come to my door and if I'm home, I'll probably buy what they are selling.
The Kirby vacuum was a major deal. I was 19 and just married and the guy came to shampoo one room of our apartment "free of charge" just to let us see the Kirby vacuum. I think the Kirby weighed more than I did at that point. You could use it as a vacuum, but you could also flock your Christmas tree with it, and paint too if you wished. The Kirby handle was shaped like a dildo and had a very strong vibration too. (The salesman didn't point that out to me, I figured that out on my own.)
The fact that the Kirby cost about $1,000 did not phase me in the slightest. What's money compared to having a really clean apartment to live in! Plus, flocking a Christmas tree could be really fun.
My husband John was not so much delighted with our new vacuum as I though he would be. To say he nearly shit is putting it mildly. (Never mind, we weren't going to be married that long anyway. Plus, I got to keep the vacuum.)
When my son was born I bought a family album plan. We got one ugly professional photo per month for the first 12 months of my son's life. Then we got an ugly photo of all of us once every three months for the next year. After that, we got a semi-annual photo, all for a very reasonable price. Yeah, right. Of course, we got maybe two ugly photos and decided to cut our losses, but we were on a contract. Damn!
When those two adorable young men, all dressed up in their suits and ties knocked at my door, I took one look at their fresh handsome faces and thought "This is my lucky day!" Seems they were missionaries for the Latter Day Saints. Of course I invited them in and offered them refreshments. We talked all afternoon and they wanted to come back the following week. Oh they were cute! I just didn't have the heart to tell them that I was a pagan. So it took about 3 visits before they realized I was not being converted after all. Pity! I liked having them visit me.
I also had a milkman named Joe that I ordered our dairy products from. I loved Joe and gave him coffee twice a week when he filled my huge order. I loved ordering things from him even if we didn't need them.
The Fuller Brush man was another frequent visitor, as was the Avon Lady. Thank goodness I got past all that. Now I just don't open the door. It's safer that way.