According to my DB the lowest price is 38.99 USD for Lenovo C9 Bluetooth (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood (38.99 USD)
Banggood warehouse is located in China. As you can see I didn’t find any active coupon for this product right now… Good or bad price? Pretty good price – average (40.59 USD) is higher than current one!
Link: Banggood product page
Price: 38.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
Coupon (16.1.2024, $35.99): BGRJANELC9
Item: Lenovo C9 Bluetooth Glasses Headphones
Countries: Greece
Old coupons (from the oldest to the newest): BG20aaff, BGf3b736, BG966fa7, BG6d8262, BG1b5830, BG5b6bb0, BGSaleFeb8, BGAudio3, BGAudio9
(these coupons are old, so probably won’t work)
Aliexpress
Click here… to search for Lenovo C9 Bluetooth Glasses Headphones on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Lenovo C9 Bluetooth Glasses Headphones.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).