You can get DumboRC X6PM-350 RC Transmitter with Receiver for $33.89 using coupon code (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
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
Latest price update (UTC time):
Banggood ($33.89)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Is it good price? Well, this price is higher than average price ($27.49)
Link: Banggood product page
Price: $33.89
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGMatt2022, BG589b2e
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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
Do you need price history chart (for all/most countries) for DumboRC X6PM-350 RC Transmitter with Receiver? 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)).