Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in Hong Kong. Too bad there’s no coupon right now in Banggood.
Link: Banggood product page
Price: -3 USD
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
Old coupons (from the oldest to the newest): BGTF6SN, 7d18f7, BGTF60SH, 13f142, BGTFF6SC, BGTF60SK, BGITTF6S, BGTF60SF, BGTF60SR, BGTF6SO, BGTF6PSR, BGTFSP03, BGTF6SO1, BGTF6SO2, BGTF615, BGTF6FAN, BGTF6SO4, BGTF6SO5, BGTF6SO6, BGEETF615, BGTF6SO7, BGTF6SO8, BGTF6S2, BGITTF6SP, BGTF6S3, BGTF6S4, BGGRTF6, BGTF6S5, BGTF6APP, BGPRTF6H1, BGTF6SPH2, BGTF6SPH1, BGTF6S6, BGTF6S7, BGTF6SSP1, BGTF6IS, BGISTF6PS, BGTF6S8, BGTF6BD1, BGTF6S78, BGTF6S77, BGTF6BD2, BGTF6S16, BGTF6S26, BGISTF6S, BGISTF6PRO, BGJPTF6SP, BGTECF6, BGSEAF6, BGGRTEF6, BGFXTEF6, BGQBTE219, BGGRTDF6, BGDCSEAF6, BGJPTEF6, BGSEPF6, BGSEPYBF6, BGDQF613, BGBRTEF6, BGSEPDEF6, 8BGwbg2204, 2203ActiesNL, BGf5fb55, tRaDetRaCKeR, 8wEbgaInS5, BGc32187, BG600922, BGCAPITALOS8, BG329fc8
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for Teclast F6 13.3 inch N3350 8/128GB Notebook.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).