$4.59 – Body Material: Copper (gold plated), Plug: XT90 Male to XT60 Female Plug, Insulator Material: Nylon.
When I was updating this page, then coupon price was $4.59 for XT90 Male to XT60 Female RC Plug (in Banggood). You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood ($4.59)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. What about the price? Hmmm, price is higher than average (which is $4.08 right now), so better set price alert down below…
Link: Banggood product page
Price: $4.59
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGToys8, BGMatt2022, BG589b2e
(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
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
Here is price history (for all/most countries) for XT90 Male to XT60 Female RC Plug. The lowest price was: $3.53.
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)).