Aliexpress
Click here… to search for DTS GT200 Drone PNP 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 (330.45 USD): BGGAL8
Coupon (337.64 USD): Drones6
Coupon (337.64 USD): CouponsDE
Coupon (337.64 USD): 00c906
(CouponsFromChina.com tip: paste coupon code in your cart and click Apply 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): 502C6B, TTxBG10, BGss9%rc, bgssaff9, AFfbG10, affbg10, BGBFCR25, BGCITYADS2019, BGVDay10%off, 2880c7, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BgoFErTaSchInA10, BgcLuBofErtA10, 7bcdf9, BG10RACING, BGMATT7, BGDAVIS, BANGGOODSD
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for DTS GT200 Drone PNP.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).