yea had someone round here the other week door knocking, free prize draw for a new car, think it could have been kirby wanting to sell their complete homecare system with the amazing head light! My mum owns one cost her £1200 about 10 years ago so does my mother in law cost her about £800, they both never use them though, just gathering dust in the loft :
It all comes down to good marketing, a few posts have recently scratched the surface of it on here.
Kirby is a worldwide brand and a very successful company, so are the big cleaning franchises, they all use and have used top flight marketing to get them where they are today. If you have the right brand and have ££££'s to market it, you have a very high chance of being successful.
Regards,
Paul