You can get 5V Active RC Buzzer With Cable for $6.92 with coupon (from Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest coupon and price update (UTC):
Cable: 160mm, Current: <25mA, Frequency: 2300±500Hz, Voltage: 3.5-5.5V
Banggood ($6.92)
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. Is it cheap? Well, this price is higher than average price ($1.84)
Link: Banggood product page
Price: $6.92
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): aff7off, rchobbies8, e2bcea, AFfbG10, BGVDay10%off, BGAFF10OFF, BGDAVIS, BGHONEY2110, Parts8, BGJON8, BGRCParts8, Tabby20, BG1efeb0, 8Couponsde, MVC8SPRING, BG8RCToy, BGJUNEGSG9, BGRCT10, BGMatt2022, BG589b2e
(you can check these old coupons out, but these probably won’t work)
Aliexpress
There’re some similar (or not) items on Aliexpress
| Image | Product (link) | Price | Coupons |
|---|---|---|---|
 |
5V Active Buzzer Alarm Beeper With Cable for FPV Racer Quadcopter Drone DIY | $1.23 | – |
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 5V Active RC Buzzer With Cable.
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)).