There’s zero profit in this. The overhead of storage and broken equipment would be insanely high and impossible to manage. Not to mention old gear is a lot heavier, more expensive to ship.
No to mention people interested in cool old gear are as rare as unicorns these days. Young people couldn’t care less for the most part. Most of them wouldn’t know what soldering even is, theyre not gonna try to repair old gear when their phone can do everything.
Nope those days are gone. Now you either suck it up and pay thousands for quality or hope you get lucky at a garage sale! Or there are still cool antique stores here and there that are carrying good old gear that they test out and sell relatively cheap.