You can create price alert here, copy coupons and view price history. What is the best price?
Color: Green / Blue, Name: Writing Board, Battery: Button Battery CR2025, Size: 28.5*20cm
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. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG8dfa37, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG00c906, BGJUNEGSG9, TTSUMMER8, Cuponation9, BG589b2e
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Aituxie LCD Writing Tablet Monochrome is here.
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)).