$69.34 – UNI-T UT502C Megohmmeter (Banggood, Aliexpress: UNI-T Digital Megohmmeter UT502C 2500V Insulation Resistance Tester Ommeter Megometer Ground Meter Backlight Auto Range (the best price with coupon)).
You can get UNI-T UT502C Megohmmeter for $69.34 with coupon (from Banggood). Price history, coupons and price alert are available on this page. What is the best price?
Latest coupon and price update (UTC):
Banggood ($69.34)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it cheap? Well, this price is higher than average price ($64.75)
Link: Banggood product page
Price: $69.34
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGM1TOOLS88, BG20236Tool, BGTOOS729, BG8FORMULAMX, BGCOUPERTBF8
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
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
Here is price history (for all/most countries) for UNI-T UT502C Megohmmeter. The lowest price was: $62.04.
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)).