You can create price alert here, copy coupons and view price history. What is the best price?
Expanded size 1700*300*3mm, Packing size 310*200*65mm, Single set weight 1.8Kg, Folding size 300*190*55mm, Name Shingled/Portable/Foldable Solar Panel, Brand CK solar, Open circuit voltage 24.5V, Working current 4.04A, USB Output 5V/3.4A /9V/2A /12V/1.5A, DC Output 19.8V/4.04A, Model CKSF80, Short circuit current 4.44A, Cell specification 158*31mm*72pc, Working voltage 19.8V, Power 80W, TYPEC Output 5V/3.4A /9V/3A /12V/2.5A /19V/3A
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($65.99): BG46f0a3
2. ($141.94): BGLMQ15
3. ($146.95): BGSCM11
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGdcbfa8, BG8ReviTrage, BGCKSL80, BGCKSL81, Cuponation9, BGCarEle4, BG18offso, BGCarEle5, BG845979, BGCAR639, BG229293
(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 CKSF80 80W 19.8V Shingled Solar Panel.
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)).