Perhaps an example will interest you.
As a real example for someone on this topic, there was a 1975 aircraft listed on ASO erroneously as a 1976 aircraft back in the third quarter of 2006. Later a guy named Yandle using the same registration number had an aircraft (the same one??) listed on Trade-a-plane for a month at a price $24,000 less expensive. More recently the aircraft was listed on Controller for two months in late 2010. And it looks like some official FAA action was recorded on 4/14/2011 - which is why we are pretty sure the year is 1975 rather than the erroneous 1976 in the 2006 listing. A price was not listed on the relatively recent Controller ad. It does appear that the plane has only been in the air for an average of 50 hours in each of the last 4 years which is below the lifetime average.