Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Item Name: 3.5 Inch 151mm F4 4S Whoop FPV Racing Drone, Wheelbase: 151mm, Upper Plate Thickness: 2mm, Size: 118*91mm, Model: Protek35 Analog, , Brand: iFlight, Bottom Plate Thickness: 3.5mm, Weight: 305±10g
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
1. ($352.96): BG589b2e
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGProtek35, BG11Racer, BG11WHOOP, 7bcdf9, BGAFF10OFF, BG9MCH, BGDAVIS, BGJPAPR16, xollodrnes25, BGpp35, BGMATT7, Cholldrons80, BG473074, BG6ccd7e, Drones6, BG06590c, BANGGOODSD, BG834631, BGRACING1125, CouponsDE, 00c906, BGGAL8, BGJON8, Tabby20, CouponsdeFPV, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, Cuponation9, BgGoodie9, BGToys8, BGMatt2022
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for iFlight Protek35 Analog 3.5 Inch 4S Drone is here.
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)).