Aliexpress
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Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – DHO804 Digital Oscilloscope 70MHz Band [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
Coupon (409.99 USD): BGef5472
(CouponsFromChina.com tip: you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGSPRING8OFF, BGHONEYSP, BGbddf98
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – DHO804 Digital Oscilloscope 70MHz Band [EU] (-3 USD)
Price history and price alert
Check out price history chart (for all/most countries) for DHO804 Digital Oscilloscope 70MHz Band.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).