Aliexpress
Click here… to search for KCASA GHK-VK201 Multitool on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (12.88 USD): Terence
Coupon (13.02 USD): BG00c906
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGVK201, TTxBG10, BG55Ghk, BG455GBG2596A, BGHP3258, BGHH499, BG455GHK, AFfbG10, BG52HH, BGBFAFF2019, BGCITYADS2019, bGpAnDacHeCk, BGVDay10%off, BGHOMEG12, BGKCASAFB, bGhOnEy10, BGdragonBoat, BGAFF10OFF, BGHome15%, BGKCASA20%, BgcLuBofErtA10, BGHONEY2110, BG10OFFAFF, BGwhielabel, 13f142, BG10OFFAFF1, BANGGOODSD, 00c906, BGAlerabat1
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for KCASA GHK-VK201 Multitool is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).