I found out about Kirby while attempting to take a 15 month old Hoover to the repair shop, hoping it was just a belt. The guy was really nice, and told me that for what it would cost to repair, I could buy another one brand new. I agreed, but expressed frustration at buying stuff that didn't last, so he started showing me a few of his refurbished units. We found out in conversation that he had 5 kids and 4 dogs, so hubby asked him what vacuum he used at home, and he immediately said Kirby. So we went home and did some research. I eventually bought a 10 year old refurb unit for $300.
They are built like tanks, and they haven't deviated in the design from the 1950's, it seems! Great vacuum, never failed me once. I moved into a house w/no carpet, so it didn't see much use. A few years ago, while moving again, I opted to sell it on Craig's List. It was close to 20 years old. I still managed to get $250 for it!
Oh, and it was great when the Kirby salesman stopped by, b/c I could easily say, yup, I already have one, thanks!, and shut the door. :)