Go down and check coupons out. Remember to check price history if it is available. What is the best price?
Current 0-2A, Weight 239G With Packing Box, Folded Size 175*130*15Mm, Name 8W ETFE Solar Folding Charger, Conversion Rate 19%, Output Interface Dual Usb, Packing Box Specification 200*140*33Mm, Process Etfe Laminated (2nd Generation Laminated Technology), Output Voltage 5V, Expanded Size 270*175Mm, Packing White Neutral Box, Wafer Grade A Polysilicon, Waterproof Grade IPX6
Aliexpress
There’re some similar (or not) items 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. There is one great coupon!
Link: Banggood product page
1. ($22.49): BGAMMT03
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): BGCarEle5, BG63715f, BGLMQ15, BGSCM11
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for 8W 5V ETFE Solar Panel? There we go.
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)).