"You cannot handle the truth"

Should anybody be weary about any equipment (mostly new) that are barely used, no way near the usual break-in period, before putting it on sale?

Like, why would anybody used it for, say, 70 hours or so, then decided to sell?  It's always a red flag to me, as if it's some kind of lemon, some forgotten freight being fall off from a truck, or the equipment sounds woeful....   I would not think any legit dealer would be that casual neither.

Not to upset anybody.... would love to hear some reasonable explanations such that I don't make the wrong assumption...
Sometimes I get very disappoint about a pice og gear. If I dont like after a week or two I sell it.
I have found sellers that have over extend themselves and need to recoup some money from an ill considered purchase. I'm fortunate to have a little bit of impulse control or I would be in the same boat.
Some people get equipment at industry discounted pricing, try it out, and sell it for a little loss or gain
n80 ….."There is always that guy on Audiogon who doesn’t like the new gadget you just sold your kidney for."

Selling a kidney to buy audio gear, ridiculous. By the way, just out of curiousity, whats the going rate for a kidney?
I have gotten much of my equipment used/demo for GREAT prices.  I recently bought a Rega Planar 6 for half price from a dealer because there is a small mar on the lid (I would think they could have replaced the lid and been far better off) and the original buyer didn't like it.  Basically brand new.  Also got a great pair of Rethm Saadhana for 1/2 price, 6 months old.  I always ask why selling when seems too good.  My Rethms were due to a job change and inability to keep them.  I win!!