Basically copy coupon, view price history or create e-mail price alert. Best price?
Water-resistant Scratch-resistant Anti-shock for Phone Tablet Power Bank USB Cable Adapter
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. ($15.03): Terence
2. ($15.03): 2203ActiesNL
3. ($15.19): BG00c906
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): BGHHbag, AFfbG10, BGBFAFF2019, BGCITYADS2019, BGBGHFRI15, 13f142, BGVDay10%off, BGHOMEG12, BGAFF10OFF, bGhOnEy10, BGELSBBJP, BGdragonBoat, BGXXAZJP, BGXXAAZJP, BGHome15%, BGHOMEA15%, BgcLuBofErtA10, BGCuponation10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BG10OFFAFF1, BANGGOODSD, 00c906, BGAlerabat1, Tabby20
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Check out price history chart (for all/most countries) for Gocomma Electronics Accessories Travel Organizer.
Price records source(s): Gearbest, 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)).