According to my DB the lowest price is $63.99 for 4Pcs iFlight XING-E Pro 2306 1700KV 3-6S RC Motor (in Banggood). You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Internal Resistance: 76.4mΩ, Idle Current(10) @10V: less than 1A, Max. Current (180S): 37.2A, Quantity: 4 PC, Model: XING-E Pro 2306, Brand Name: iFlight, KV: 1700KV, Item Name: 2306 1700KV 3-6S Brushless Motor, Version: CW Screw Thread, Shaft Diameter: 5mm, Stator Diameter: 23mm, Max. Con. Power (180S): 893W, Stator Length: 6mm, Configuration: 12N14P, Input Voltage: 3-6S, Weight: 33.1g, Motor Dimension: 29.5×18.7mm (Dia*Len)
Latest coupon and price update (UTC):
Banggood ($63.99)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Well, is it a good price anyway? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $58.84)
Link: Banggood product page
Price: $63.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, hoNEYbGdeAlS, BGRCT10, BGJUNEGSG9, Cuponation9, 9OFFSUMMER, COUPONSDE1wk, BGToys8, BGMatt2022, BG589b2e, BGAUGUST8, BGCAPITALOS8, BGCOUPERT8, BG8FORMULAMX
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for 4Pcs iFlight XING-E Pro 2306 1700KV 3-6S RC Motor.
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)).