Moved to Forum: Original Link
Reason: No specific link to item / seller. Many of the listings on the link are sold by a seller with low feedback scores (does not meet Aliexpress Deal Posting Guidelines)
Haven't posted to any specific sellers on AliExpress, find the best deal and one you're most comfortable with, basically my partner is due for an upgrade (Snapdragon 845) and I have a Snapdragon 8 Gen1 phone [Motorola Edge X30], which was a significant boost in performance on both CPU and GPU side over previous generations.
It's the chipset found in the Samsung S22 and derivative phones.
https://www.gsmarena.com/compare.php3?idPhone1=11285&idPhone…
It's way more powerful than I need, so I've been carefully watching prices for phones that have them.
The Xiaomi 12 is now cheap compared to other new phones with this chipset or later, everything else starts around $650 up to over a grand, and roughly parity with used phones from other brands.
I'd say it's the best deal for under $500 on a new phone right now, and even cheaper than GSMArena lists them ($300USD):
https://www.gsmarena.com/xiaomi_12-11285.php
Just make sure it's the Xiaomi 12, and not the 12S, or the Xiaomi Redmi 12 etc [modern phone naming sucks] which all have lesser chipsets. 12 Pro counts but it's more expensive.

be aware that the cheap ones are actually used phones, probably refurbs. see the end of the titles, and in the pics they dont have the original boxes.
id be wary if the batteries were replaced, but hard to say what has been repaired in them.