I have checked all old coupons and price is $26.6 for FNIRSI LCR-ST1 Mini Smart Tweezer LCR SMD ESR Tester (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
FNIRSI LCR-ST1 Mini Smart Tweezer LCR SMD ESR Tester Resistance Capacitance Inductance Continuity Diode Test Measurement Tools – 1
Latest coupon and price update (UTC):
Banggood ($26.60)
Banggood warehouse is located in China. Good or bad price? Current price is the lowest in history (according to CouponsFromChina database)! There are 2 active coupons in my database. Check it out.
Link: Banggood product page
Price without coupon: $29.99
1. ($26.60): BGEEUMEGA21
2. ($27.99): BGedd552
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
This is the best price ever noted in my database!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG6f1ec6
(these coupons are old, so probably won’t work)
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 FNIRSI LCR-ST1 Mini Smart Tweezer LCR SMD ESR Tester.
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)).