Aliexpress
Click here… to search for AKKO 3108 V2 108 Key PBT Akko Switch Keyboard on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
Coupon (80.99 USD): BGAFF10OFF
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): BGCPP019, AFfbG10, Email5, BGVDay10%off, bGhOnEy10, BGSS10%SW, BgoFErTaSchInA10, BgcLuBofErtA10
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for AKKO 3108 V2 108 Key PBT Akko Switch Keyboard.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).