$37.94 – Brand Name: FMS, Usage: Suitable for RC Airplane, Motor: 2627 KV4500(4S)/ KV5400(3S) (Optional), Weight: 75g, Item Name: 50mm 11 blades Ducted Fan.
Use coupon and get FMS 50mm 11 Blades Ducted Fan EDF RC Motor for $37.94 (from Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
Latest price update (UTC time):
Banggood ($37.94)
Banggood warehouse is located in China. Coupons for FMS 50mm 11 Blades Ducted Fan EDF RC Motor? Nope, there’re no coupons in Banggood. But wait a sec… Is it a good price? It looks like it’s a good price (lower than average ($38.26)).
Link: Banggood product page
Price: $37.94
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): Parts8, BGRCParts8, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, 8wEbgaInS5, BG8RCToy, hoNEYbGdeAlS, BGJUNEGSG9, BGRCT10, BG8ReviTrage, Cuponation9, BGToys8, BG8OFFCOUPON, BGMatt2022, BG8FORMULAMX
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for FMS 50mm 11 Blades Ducted Fan EDF RC Motor is here. The lowest price was: $32.99.
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)).