I wouldn't be so quick to say no one would do that. I scored most of my RC stuff from a guy that was HUUUGE in the hobby and race scene 6-8 years ago. All his stuff sat around in mint condition pretty much for the past 5 years or so. Some motors only had minimal break in time (4-6 tanks on em) when I got em....and when I took them apart....you could tell.
Ask marauder. I sold him a TC3 that had been sitting on a shelf for YEARS. It was brand new....never even run. There are people out there that buy stuff on a whim, or have their plans changed last minute. So your best bet is to go look it over and make your own decision. If I told you all the stuff I got from this guy, and what I paid for it...you would fall out of your chair. In my case, this guy built a few rigs and then SEVERELY hurt his back forcing him out of the hobby. I have his old toolbox....he was good back in his day. LOT of A Main 1st place plaques stuck to the box with his name on it.
I mean I just bought a Team Losi XXX-NT Adam Drake 1 from a guy. He told me he broke it in, ran it up the street a few times....and put it on a shelf because all his friends ran electric. That truck came out quite a few years ago, and there is barely a scratch on the chassis....and I can't spin the flywheel with my fingers because the motor is so tight. I bought the truck for less than you would pay for a good quality Lipo battery, and did some wrenching and it purrs like a kitten.
Life happens.....our toys come second to life.