$115.99 – 3 in1 Digital Oscilloscope Multimeter Signal Generator 120MHz (Banggood, Aliexpress: 3 in1 Digital Oscilloscope Multimeter Signal Generator 120MHz IPS Display Dual Channel FFT Zoom Mode Portable Testing Tool (the best price with coupon)).
ATM you can buy 3 in1 Digital Oscilloscope Multimeter Signal Generator 120MHz for $115.99 (in Banggood). Just check coupons out (with price alert and history). What is the best price?
Latest price update (UTC time):
Banggood ($115.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. What about the price? From what I can see this price is higher than average price ($112.99).
Link: Banggood product page
Price: $115.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BGTOOS729, BG8FORMULAMX, BGBFDAY8
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 3 in1 Digital Oscilloscope Multimeter Signal Generator 120MHz is here. The lowest price was: $109.99.
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)).