Why anyone would buy old used gear in this hobby is crazy. Unless they just had to have it. It's a communication device. Get something you can count on. Like your adult pacifier.
Sorry, but that's just nonsense. Here's why:
1) If someone only buys new gear, they're limited to what is currently available. If what they want/need isn't currently available, they're out of luck.
2) Used gear can be a great way to save big money. Usually, one pays top dollar for new gear.
3) Just because something is new doesn't mean it's reliable. All too often, a new product has problems that only become apparent after a time.
4) Just because something is used doesn't mean it has problems, or will have problems. There are plenty of older rigs out there doing a great job after decades of service.
5) Many of us know how to deal with rig problems and how to avoid and fix them.
6) If everyone only bought new gear, used gear would have no value and Amateur Radio would be a MUCH more expensive activity for most people. (A few of us would actually be better off because we'd dumpster-dive the used gear and have great stations for very little money.)
Of course, there are SOME folks who try to peddle used, damaged old radio stuff ("It only needs a tube", "Don't know if it works" "It worked the last time it was turned on" (which was decades ago), "The rust is only surface rust, it just needs some welding") at ridiculously high prices, cash only, no warranty, pick-up only, and then wonder why they have no buyers even after years of trying to sell something.
None of that is a reason to avoid used gear.
So, tell us: what is YOUR station like? What gear do YOU use?