$34.19 – Bandwidth: 200KHz, Duty cycle: 0-100%, Package weight: 72g / 2.5ounce, X10: ±400V(Vpp: 800V) (only type3&4), Sampling rate: 2.5MS/s, Package size: 65 * 60 * 18mm / 2.6 * 2.4 * 0.8in, X1: ±40V(Vpp: 80V), Trigger modes: Single / Automatic / Normal, Voltage ranges: , Coupled mode: AC/Direct current, Battery: 1 * lithium battery / 1250mAh (built-in), Material: PCB, Frequency: 0-80kHz, PWM output: 3.3V.
I am monitoring price for FNIRSI 138Pro Oscilloscope and it is for $34.19 now (in Banggood). You can create price alert here, copy coupons and view price history. What is best price?
Latest price update (UTC time):
Banggood ($34.19)
Banggood warehouse is located in China. The question is – is it a good price? Maybe there’re no more promotions for this item, because current price is higher than average (which is equal $26.49) There is one great coupon!
Link: Banggood product page
Price without coupon: $35.99
1. ($34.19): BGMAI666
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG9FEB2023C, BGM1TOOLS88, BG20236Tool, BGTOOS729
(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
Here is price history (for all/most countries) for FNIRSI 138Pro Oscilloscope. The lowest price was: $25.99.
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)).