Just check coupons out (with price alert and history). Let’s see what best price is ATM.
Item Name: 210mm Wheelbase FPV Racing Frame Kit, Wheelbase: 210mm, Top Plate Thickness: 1.5mm, Material: 3K Carbon Fiber, Brand Name: HSKRC, Model: TWE210, Aluminum Standoff: M3*35, Arm & Bottom Plate Thickness: 4mm, Weight: 114g
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
HSKRC TWE210 210mm Wheelbase 4mm Arm 3K Carbon Fiber X Type Frame Kit for RC Models Multicopter Racing DIY Parts | $28.91 | – |
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. ($19.87): Cuponation9
2. ($20.08): BG8ReviTrage
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGJUNEGSG9, 9OFFSUMMER
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for HSKRC TWE210 210mm 4mm Arm 3K Drone Frame Kit.
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)).