A couple of rare Xiaomi smartphones are currently being offered for sale: a Xiaomi Mi 6 Mercury Silver Edition and a Xiaomi Mi 7 prototype sample. The special variant of the Mi 6 can be purchased for 19,999 yuan (US$2,831) but you will need to have very deep pockets if you want to get your hands on the extremely rare Xiaomi Mi 7 device.
https://www.notebookcheck.net/Xiaomi-Mi-6-Mercury-Silver-Edition-on-sale-for-19-999-yuan-US-2-831-or-bid-for-a-Xiaomi-Mi-7-prototype-for-over-1-million-yuan-US-141-597.463477.0.html