Weight: About 13g, Suitable for: WPL D12 B14 B24 B16 B36 C14 C24 C34 C44 MN D90 MN99S remote control truck rc car vehicles models, Made of good-quality materials / more durable and improved appearance, 100% brand new, Color: Green, Material: Composite material.
Price history, coupons and price alert are available on this page. 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 coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
1. ($17.28): BGJUNEGSG9
put item in your cart and apply coupon code there 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): 8wEbgaInS5, pROMo8cuPoN
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for WPL Sound System Receiver RC Board. The lowest price was: $17.28.
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)).