Wow, everything posted for sale is ''light use''??

Couple thoughts. I have benefited from others impatience in allowing time for burn in. In such a case, I surmise that the seller concluded it is not what they are looking for after few hours, when in fact, they obviously needed to put some more hours on it.
Another thought is that some people are subject to impulse buying, or perhaps are just dealing with poor synergy with other pieces.
I have found little reason to question the veracity of most of the listings on this site. The trust that enables us to sell our used gear on this site is essential for most of us to be able to continue in this hobby. Its not worth picking up a few extra bucks on a sale.
BTW, I have a lightly used 12 yr old pair of Maggies for sale, fully broken in, but just barely. Not only do they sound great, but they also make outstanding sleds. Just a few nicks here and there from hitting a tree. Almost impossible to see the damage from 500'. At price, I'll through in a NOS 1962 Mullard GZ34 that I bought from E-Bay. Tests good, sounds like crap.

For some people I suspect light use means they didn't prop their car up on their monoblocks while changing a tire. There are those who have systems in vacation homes, some who have very little free time ( more money than time), and those who don't listen much because their system doesn't engage the listener.
For the most part, I would expect a really good sounding piece to be listed as "heavy, heavy, use-- it sounds so good I can't turn it off." Be forewarned, if I sell a piece as lightly used, you don't want it.