Latest update shows that RadioMaster R81 2.4GHz 8CH Nano RC Receiver costs $10.99 (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Antenna length: Approximaltly 6cm, Output format: SBUS, Control distance: more than 1km, Model: R81, Channels: 8CH, Power input range: 4.5-6V, Signal format: FrSky D8 Compatible, Support return: support return RSSI, Weight: 2g, Size: 17*11 mm, , Frequency range: 2400-2483.5Mhz, Item Name: R81 Nano Receiver, Brand Name: RadioMaster
Latest coupon code price check (UTC time):
Banggood ($10.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. What about the price? It’s a good price, isn’t it? The average is $16.30.
Link: Banggood product page
Price: $10.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG3bfb5e, Parts8, BGe212d5, BGe7d464, BGGAL8, BGfc037e, BGRCParts8, 2022ACTIESNL, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, BGToys1, BGRCT10, BGJUNEGSG9, BGRADIORU, BGToys8, BGMatt2022, BG589b2e
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – RadioMaster R81 2.4GHz 8CH Nano RC Receiver [EU] ($-3)
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
Check out price history chart (for all/most countries) for RadioMaster R81 2.4GHz 8CH Nano RC Receiver.
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)).