You can get DumboRC X6PM-350 RC Transmitter with Receiver for $30.89 using coupon code (in Banggood). Just check coupons out (with price alert and history). Do you want to know what the best price is?
Latest price update (UTC time):
DumboRC X6PM-350 2.4GHz 6CH Mini Radio Transmitter Support Gyro With X6FG/X6DCG/X6FP/X4FMG/BL3F Receiver for RC Car Boat Tank Model Parts – X6PM-350+X6FG Receiver
Banggood ($30.89)
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood. The question is – is it a good price? This price is higher than average price ($27.49) for this item.
Link: Banggood product page
Price: $30.89
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMatt2022, BG589b2e
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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
Here is price history (for all/most countries) for DumboRC X6PM-350 RC Transmitter with 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)).