Aliexpress
Click here… to search for SKYRC PC1500 25A 12/14S 1500W RC Battery Charger on Aliexpress
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (547.83 USD): BGRCBC11
Coupon (572.73 USD): Parts8
(CouponsFromChina.com tip: just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGSKYRC, BGCuponation10, BGDAVIS, BGHONEY2110
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for SKYRC PC1500 25A 12/14S 1500W RC Battery Charger is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).