The coupon price for DHO814 Digital Oscilloscope 100MHz 12-bit 1.25 GSa/s is $499.99 (in Banggood). Just check coupons out (with price alert and history). Let’s see what best price is ATM.
DHO814 Digital Oscilloscope 100MHz 12-bit High Resolution 1.25 GSa/s Real Time Sampling 4 Channel Kit Advanced Signal Processing UltraHD Touch Screen User-friendly Practical Lab Equipment
Latest coupon and price update (UTC):
Banggood ($499.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Is it good price? Well, this price is higher than average price ($495.59)
Link: Banggood product page
Price: $499.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGNEWYEAR8, BG47686e, BGSPRING8OFF, BG6ce487
(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
Here is price history (for all/most countries) for DHO814 Digital Oscilloscope 100MHz 12-bit 1.25 GSa/s.
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)).