Basically copy coupon, view price history or create e-mail price alert. Best price?
RF interface: SMA-outer screw inner hole (adapted antenna inner screw inner pin), Remote control refresh rate: 25Hz-500Hz, Power supply: internal power supply: 6-13V / external power supply 6-16V, Model: FLASH_TX, Remote control distance: >3000m, Wireless frequency: 2400-2480MHz, 2.4GHz Flash TX Module: , Size: 64*52*40mm, Transmitting power: <27dBm
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): Parts8, BGradio9, BG70e5fc, BGGAL8, BGRCParts8, BG1efeb0, BGf1d139, 8BGwbg2204, tRaDetRaCKeR, BG6f8538, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGRCT10, BGJUNEGSG9, BGRADIORU, BGToys8, BGSaleFeb8, BGMatt2022, BG589b2e, BG8FORMULAMX
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Namimno ExpressLRS ELRS 2.4G RC Nano RX ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Namimno ExpressLRS ELRS 2.4G RC Flash TX Module? There we go.
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)).