GVDA GD151B Digital Sound Level Meter is for $31.99 (in Banggood). Price history, coupons and price alert are available on this page. You probably want to know what is the best price?
Latest price update (UTC time):
GVDA GD151A/GD151B Digital Sound Level Meter Audio Level Meter Sonometro Sound Meter Decibelimetro 30-130dB Decibel Meter Portable Noise Meter – GD151B
Banggood ($31.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it a reasonable price for this item? This price is higher than average price ($22.28) for this item.
Link: Banggood product page
Price: $31.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
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 GVDA GD151B Digital Sound Level Meter? 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)).