You can create price alert here, copy coupons and view price history. Best price?
Output: 5V – 3A, Input: AC 100V – 240V, Material (Cable&Adapter): ABS
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.
Link: Banggood product page
1. ($15.29): BGHONEY2110
2. ($15.99): 13f142
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): TTxBG10, BG3CSUM, AFfbG10, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGXMI15, BGdragonBoat, BGSS10%SW, bgshOOp10, BgoFErTaSchInA10, BgcLuBofErtA10, BG20CHARGER, BGMBCBLE, BGCuponation10
(there’s a little possibility that old coupon will work)
Price history and price alert
Check out price history chart (for all/most countries) for USAMS US-CC035 3Port Wall Charger.
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)).