"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...
Touche glupson2. Years ago, after a year or more of reading rave pro and owner reviews of the Pass Labs 250.5, I sold an amp I loved and bought the Pass in perfect condition. I hated the way it sounded and wanted to get rid of it ASAP. Punchline...the guy that I sold it to didn't like it either.
Sometimes we end up not liking what we thought we would like. That's one reason.  
And in this day & age of the brick & morter disappearance, the audio salons where you can see, touch, feel & hear just aren't there anymore, so many of us buy these expensive items *we're only reading about* (see my credit card statements for vintage European 12AX7's this last couple of months), leaving plenty of room for error and more active AG accounts. My stereo was a lot more stable in the 90's.

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