Aliexpress
Click here… to search for Geprc Rocket Lite 112mm F4 4S Drone PNP 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 (365.53 USD): BGGAL8
Coupon (373.47 USD): CouponsDE
(CouponsFromChina.com tip: just apply this code in your cart 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): BG4RL, bGhOnEy10, BG5RL9, BGdragonBoat, BGSS10%SW, bgshOOp10, BGRC902, BGANRL, BgoFErTaSchInA10, BgcLuBofErtA10, BGAFF10OFF, BG10RACING, 7bcdf9, BGGEP30, BGDAVIS, BGMATT7, Drones6, BANGGOODSD, 6GSGIT
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Price history (for all/most countries) for Geprc Rocket Lite 112mm F4 4S Drone PNP is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).