Aliexpress
Click here… to search for Xiaowei Wall-mounted Soap Dispenser on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (12.21 USD): BG589b2e
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGXW599, BGXV555, AFfbG10, BGWALL639, BGPLK23, 502C6B, BGCITYADS2019, BGORGN59, BGVDay10%off, BG55SP, BGHOMEG12, BG303cv, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, BGCuponation10, 13f142, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, 00c906, BG00c906, BGAlerabat1, Terence, Tabby20, 2203ActiesNL, BG1efeb0, BG1afa3b, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGed4279, BGJUNEGSG9, Cuponation9, BG778285, 9OFFSUMMER, BGb2361c, BGf625a4
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Xiaowei Wall-mounted Soap Dispenser.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).