Aliexpress
Click here… to search for 4Pcs/Set Gokwh 3.2V 280Ah Lifepo4 Battery [EU] on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Sorry, but there’s no price history in my database. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
Coupon (437.99 USD): BGdcc39d
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: 437.99 USD.
You can set price alert (for Banggood).