I get kids asking me here in asia, if anybody is selling, IMHO I say no, because I think they're just moving out of certain regions of china, boxing the equipment and finding a new home,
Why would you say no? the Chinese sell miners every day, it all depends on your expectations, most people falsely believe that the Chinese are rushing to flee with their gears and that the police are after them and thus they would sell their gears for the first buyer they meet, that couldn't be further from the truth.
Mining gear prices did drop compared to say 3 months ago when bitcoin was at 60k and mining was ok in China, but nothing too crazy, S19 pro still trades between 8-9k in China, used S9s are back above $200 (most clean gears will be in the 250-300 dollar range), Used M20s are 3k each, M21s is anywhere between 2 to 2.5k depending on the hashrate, so if your "kids" can pay these prices, they can buy all the gears they want.