According to my DB the lowest price is $13.99 for ETOPOO Digital Depth Gauge 0-80mm (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
ETOPOO Digital Depth Gauge Aluminum Alloy 0-80MM Range Multifunction Tool with High Precision 0.01MM Resolution LCD Display for Woodworking Kitchen Appliances and Electronic Devices
Latest coupon and price update (UTC):
Banggood ($13.99)
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood. Good or bad price? Cool, average is $14.10, so current price is lower!
Link: Banggood product page
Price: $13.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGWDT15, BG76cfa1
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
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
Check out price history chart (for all/most countries) for ETOPOO Digital Depth Gauge 0-80mm.
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)).