S9 makes a small profit at 4 cents Khw now, but that won't last long, so eventually, you want better gears, the 17 series of Bitmain are terrible and they have a high failure rate, S19 pro is super expensive, honestly, now isn't the best time to be buying a mining gear, but maybe get 1-2 S9s to start with, this mining mania should be over in a few months and then you can get S19s or M30s at reasonable prices.
Yes, S19 Pro is way to expensive... But how about S9 i/j/k? Arent't these kind of newer models?
Most of the time, it's either they send you a dead machine or nothing at all, and most of the prices there are outdated, so the legit guys will give you the new price which is above $200 for S9 in China.
Valuable advice, thank you! Saves me certainly unnecessary frustration.
Check the market place in this forum, Miner Experts aka Grace is a good seller based in China, Scott and Kaboom are solid sellers based in the U.S, alternatively, you could try to find them locally in Kazhaztan, do a bit of googling and make a "Want to buy" topic in the Hardware Market place, you might get lucky.
You mean buying here from a member of the forum? I must admit I am a skeptical person, but a private purchase here is probably more trustworthy than a purchase on AliBaba.