Aliexpress
Click here… to search for JK01 2.4G 14CH 4WD DIY Mecha Clamp RC Manipliator on Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s 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!
Old coupons (from the oldest to the newest): BGROBOT10, BGAlerabat1, Tabby20, BG589b2e, BGCAPITALOS8, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for JK01 2.4G 14CH 4WD DIY Mecha Clamp RC Manipliator.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).