If its in sales I was told they are a bunch of cold pressure selling hard nosed b'stards. Make a good product but charge the earth for it and use less than ethical sales techniques, alledgedly. I know a former salesman
I had a mate who had a salesman call at his house about 10 years ago and had to threaten him because he wouldn't leave. Don't know if there sales practices have altered over the years, but that wasn't an isolated incident. I have heard other people complain about the aggresiveness of the sales people.
Also had an experience with a Kirby salesman. My mother let one in for the inevitable demonstration and hard-sell. It went on forever and when she decided she wasn't gonna buy one (the price) the guy made her feel very uneasy with his manner and vocab. Luckily I came through the door, noticed immediately that there was tension in the air and booted him out. That was a good 10 years ago though, so they may have changed.
Worked for them for 18 months about 15 yrs ago - unless they have changed, which I doubt, then don't do it.
Total Barstewards who use every hard-sell tactic in the book to embarrass you into paying about a grand for a machine far better than most people need for domestic purposes. If the job is selling (and knowing them even if they say it isn't it probably will be) avoid like the plague. As a kid I accepted a "free holiday voucher" from a door-knocker, not realising that it said on the back that acceptance of the voucher was acceptance of an unmentioned "sales presentation". This turned out to be a long, long evening for my poor father who took some months to forgive me. I remember the guy was demonstrating the machine on his knees, letting us see holes in the soles of his shoes, and thinking it was strange that he hadn't thrown them out. Only years later did I see this mentioned in a "hard selling" documentary as a famous tactic - i.e. to make the householder think that you are desperate to make a sale. What utter tossers.