many times people don't actually make up an age, it sort of falls into how long they owned it, and they use that....
they may buy a 15 year old machine, use it for two years, then try selling it as being only two years old....
amazing what people think up in their minds.....
never understood why a date code is hidden into a model/serial number when it comes to appliances, rather than stamp a manufacturer date on the back somewhere...
like automobiles, we can recognize right away by the year it was made, or changes from one year to the next...
then again, why make life simple!