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 (14.39 USD): BGAFF10OFF
Coupon (14.39 USD): BgcLuBofErtA10
Coupon (14.99 USD): 13f142
(CouponsFromChina.com tip: coupon code has to be applied in shop’s 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): 25BS6, 25BWBS6, 50se0, d4de0b, 502C6B, 12blitzw, MayDay10, BGss10%bw, AFfbG10, BGBS6, BGBFCR02, BgoFErTaSchInA10
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for BlitzWolf BW-BS6 Bluetooth Selfie Stick.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).