Aliexpress
Click here… to search for BlitzWolf BW-A4 Type C to USB2.0 OTG Adapter 2pcs on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 33A4, 502C6B, BGBW5A4, AFfbG10, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGXMI15, BGdragonBoat, BGSS10%SW, BgoFErTaSchInA10, BgcLuBofErtA10, BG20CHARGER, 10%ForNewBW, BGMBCBLE, 10%ForBGBW, BGHONEY2110, 13f142, BG0d43c0, BANGGOODSD, BG85d5c6
(these coupons are old, so probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for BlitzWolf BW-A4 Type C to USB2.0 OTG Adapter 2pcs? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).