Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Item Name: X12 AIO 5-IN-1 Flight controller built-in 12A ESC and OPENVTX, PNP Version: CRAZYBEEF4DX, Support 1-2S Lipo/LIHV battery, Size: 30mm*30mm*8mm, Brand Name: Happymodel, LITE Version: CRAZYBEEF4SX1280, FRSKY Version: CRAZYBEEF4FR, Betaflight firmware target: , VTX antenna: U.FL, ELRS Version: CRAZYBEEF4SX1280, Weight: 5.1g
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. Too bad there’s no coupon right now in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 8BGwbg2204, BGRCParts8, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8RCToy, hoNEYbGdeAlS, BGToys1, BGRCT10, BGJUNEGSG9, Cuponation9, 9OFFSUMMER, BGMatt2022, BGToys8, BGGutscheine, BG8OFFCOUPON, TTBLACK5, JanBGCoupon8, BGSaleFeb8, BGSaleAD, BGMARCHSALE, BG589b2e, BGAUGUST8, BGCAPITALOS8, BGCOUPERT8, BGBFDAY8, BGNEWYEAR8
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – 25.5×25.5mm Happymodel X12 5in1 AIO Flight Controller 1-2S 12A [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for 25.5×25.5mm Happymodel X12 5in1 AIO Flight Controller 1-2S 12A.
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)).