Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Cleaning: Button Split elimination, Size: 12 inch, Handwriting Color: Green, Power: button battery, Writing life: ≥50 /000 times, Product Name: Writing Tablet, Size: 28.5X18.5X0.4(CM)
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($9.99): BG3e9671
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG9126ad, BGAS675, 13f142, BG04d198, BANGGOODSD, 6GSGIT, 00c906, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Aituxie XS-Q12S 12 Inch LCD Writing Tablet.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).