Aliexpress
Click here… to search for HGLRC XJB-145 Drone PNP Blue on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (143.99 USD): bGhOnEy10
Coupon (143.99 USD): BgcLuBofErtA10
(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): 20xjb145, XJB132, 129HX, 502C6B, TTxBG10, 10rcdrones, AFfbG10, BGBFCR25, BGCITYADS2019, BGMPB2020, BgoFErTaSchInA10
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for HGLRC XJB-145 Drone PNP Blue is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).