Use coupon and get 6.0×3.0 6 Inch for 18.19 USD (from Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood (18.19 USD)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Isn’t it too expensive? This price is higher than average price (17.38 USD) for this item.
Link: Banggood product page
Price: 18.19 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGa68d71, BGMatt2022, BGToys8, BG589b2e
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
Click here… to search for 10 Pairs Gemfan Freestyle 6030 6.0×3.0 6 Inch 3-Blade RC Propeller on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for 10 Pairs Gemfan Freestyle 6030 6.0×3.0 6 Inch 3-Blade RC Propeller.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).