OnePlus Mclaren Warp Dash Cable for OnePlus 7 6T 6 5 5T 3 3T, length: 100cm, Support 5V 6A Fast Dash Charge.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($14.87): BG1efeb0
2. ($15.03): Terence
3. ($15.03): 2203ActiesNL
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): TTxBG10, BG3CSUM, bgssaff9, AFfbG10, BGCITYADS2019, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BgoFErTaSchInA10, BgcLuBofErtA10, BG20CHARGER, BGMBCBLE, BGHONEY2110, 13f142, BANGGOODSD, BG85d5c6, 2022ACTIESNL, Tabby20
(there’s a little possibility that old coupon will work)
Price history and price alert
Do you need price history chart (for all/most countries) for OnePlus Mclaren 1M 6A Cable? There we go. The lowest price was: $3.79.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).