Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
450mAh, up to 10 hours talk time when connected to cell phone, Bike-to-bike intercom for rider and passenger or two separate bikes up to 800 -1000 meters
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Price history and price alert
Do you need price history chart (for all/most countries) for AutoLover BT-S2 Intercom 2pcs? There we go.
Price records source(s): Gearbest
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)).