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 (16.18 USD): tRaDetRaCKeR
Coupon (16.18 USD): 8wEbgaInS5
Coupon (16.53 USD): BG00c906
(CouponsFromChina.com tip: you should apply the coupon 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): BGNL967, BgcLuBofErtA10, BGAFF10OFF, BGEES09, BGCuponation10, BGHONEY2110, 13f142, 00c906, ADMITAD2212, 2022ACTIESNL, Terence
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Here is price history (for all/most countries) for NewLight NLT-L085CE 8.5 inch Writing Tablet.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).