AIO 5.8G 40CH 25mW VTX / 700tvl camera with smartaudio, Betaflight OSD support, Crazybee F4 PRO V2.1 AIO Flight controller 2-3s Lipo Compatible, The lightest 1102 brushless motor only 2.7g with double ball bearings, 2mm carbon fiber frame with TPU 3d-printed canopy, Full telemetry function ready (Frsky and Flysky version support), Powerful and smoothly, current from your goggles(DSMX version no RSSI output), Voltage, Compatible both for 2s-3s Lipo/LIHV, Light, easy to get RSSI.
Basically copy coupon, view price history or create e-mail price alert. Best price?
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.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($72.47): BGAFF10OFF
2. ($72.47): bGhOnEy10
3. ($73.52): Email5
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): TTxBG10, 781622, BGSailfly, BGSailflyX, 2019SPEDM, aff7off, AFfbG10, BGWKSX, BG20HMX, BGNDSX, 502C6B, BGSaiflyX, BGBFCR25, BGWKSailfyX, BG25SX, BGSP25fx, BGVDay10%off, BGAUHMX
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Happymodel Sailfly-X 105mm Drone PNP ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Happymodel Sailfly-X 105mm Drone BNF. The lowest price was: $66.
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)).