You can get NanoVNA-F V2 50kHz-3GHz Vector Network Analyzer for $106.9 using coupon code (in Banggood). You can create price alert here, copy coupons and view price history. What is best price?
Latest coupon code price check (UTC time):
Main color: black, Battery: 1 * lithium battery / 5000mAh, RF output power: -9dBm (error within 1GHz: ±1dB), Number of scanning points: 101 points, Number of calibration points: 101 points, Material: aluminum alloy(case), S21 dynamic ranges: 70dB (1.5GHz) / 60dB (3GHz), 2-port return loss: 20dB typ (1.5GHz) / 13dB min (3GHz), Frequency accuracy: <0.5ppm, Frequency: 50kHz-3GHz, S11 dynamic ranges: 50dB (1.5GHz) / 40dB (3GHz)
Banggood ($106.90)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Price? Pretty good price – average ($116.07) is higher than current one!
Link: Banggood product page
Price: $106.9
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG0fad6b, BGTOOS729, BG8FORMULAMX, BGBFDAY8, BGNEWYEAR8
(you can check these old coupons out, but these 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
Do you need price history chart (for all/most countries) for NanoVNA-F V2 50kHz-3GHz Vector Network Analyzer? 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)).