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 (35.99 USD): BGAFF10OFF
Coupon (35.99 USD): bGhOnEy10
Coupon (35.99 USD): BGdragonBoat
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): 502C6B, BGRST, BGsolder, AFfbG10, BGWKtool, 7d18f7, BGSS10%SW, bgshOOp10
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Realacc V2 Third Hand Seven Arm Soldering Station? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).