Aliexpress
Click here… to search for Gocomma USB3.0 to SATA / IDE Hard Disk Adapter 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 (27.44 USD): BGAFF10OFF
Coupon (27.44 USD): BGNDS10OFF
(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): BG080fc8, AFfbG10, 0e7f33, FBCOUPON1, BgcLuBofErtA10
(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 Gocomma USB3.0 to SATA / IDE Hard Disk Adapter? There we go.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).