Right now the best price with coupon code for XT60 Female is 4.59 USD (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Best price?
Latest coupon code price check (UTC time):
Banggood (4.59 USD)
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? Hmmm, price is higher than average (which is 4.41 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 4.59 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGToys8, BGMatt2022, BG589b2e
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
Click here… to search for XT90 Male to XT60 Female RC Plug on Aliexpress
Here are coupons that you can use.
Price history and price alert
Here is price history (for all/most countries) for XT90 Male to XT60 Female RC Plug.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).