How long does your used asic miner lasted for? If you are using used mining equipment please drop your results on here, have you ever bought a particular used equipment that lasted for years with no problems at all? For how long actually?
I bought a dozen of S9s in 2019 and they lasted for years without issues for the most part, but I am sure as hell if you buy them now they will start falling in no time, everyone's exerpince with used gears is different, how long have they been mining for? how did the previous owner/s treat them? it's a lot of questions, the end result is "all depends on your luck".
You can make things slightly better for yourself by not buying gears that are known to have a high failure rate like all the Antminer 17 series.
Could you advise someone to buy used Asic miners too? Or newer is safer? Does new or used matter?
I'd stick to new gears if are available at a good price unless the ROI difference between new and used is 8 months or so, then ya, i'd take the risk with used gears, if it's just 3-4 months, I rather take less risk.
If you make up your mind and decide what gears you want to buy, you can reach out to me and I'll send you a quote, keep in mind that nearly all used gears are sold as is, you get a video showing the SN of the miner and it's hashrate, the moment it's shipped -- it's all on you, with new gears, you get a 1-year warranty.