Liaow.com are reliable. Trading Shenzen is where I got mine, just as Liaow were out of stock
As above you need to put this ROM on it. The default software is usable but it very... China. With bloatware and such and some apps unable to be set to English
One thing about importing phones. Chinese phones do not use the same bands as Europe for 4G. (if you look at the phone stats on gsmmarena.com and Google your provider's bands you can check if they match)
Not sure where you are, but I am in the UK. I switched to EE because they repurposed their 3G bands for 4G. I don't lose coverage
Would really recommend this phone. The lack of a notch is brilliant. The selfie cam suffers in return, but it's good enough. Maybe not in really low light. The actual main camera is great, not best in class, but like much of this phone, it's just absolutely premium top to bottom. The wired charging time is crazy. Wireless charging too. Waterproof. I've had it in the sea, the phone is fine.
Downsides ummmmm. If you're a big Google Pay user maybe, you have to unlock the bootloader to install any ROM. There are solutions sometimes (I don't use it myself so sorry I'm not fully versed on that)