Aliexpress
Click here… to search for OnePlus Dash Type-C USB Cable 1.5m on Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – OnePlus Dash Type-C USB Cable 1m (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (7.64 USD): BGAFF10OFF
Coupon (7.64 USD): BgcLuBofErtA10
(CouponsFromChina.com tip: this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Old coupons (from the oldest to the newest): 502C6B, 20MWC, TTxBG10, 2019SPEDM, AFfbG10, affbg10, BGBFAFF2019, BGCITYADS2019, BGVDay10%off, BGBAK15, bGhOnEy10, BGXMI15, BGdragonBoat, BGSS10%SW, BgoFErTaSchInA10
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – OnePlus Dash Type-C USB Cable 1m (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for OnePlus Dash Type-C USB Cable 1.5m.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).