Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – FY6800 2-Channel DDS Signal Generator [EU/UK] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one great coupon!
Link: Banggood product page
Coupon (104.89 USD): BGGines
(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): 9ec3a1, 502C6B, e2bcea, 15ANENG, AFfbG10, d459b8, BGVDay10%off, BGAFF10OFF, bGhOnEy10, BGDANIU, 4000c3, 7d18f7, BGherra, BGHALLOWEEN, BGCuponation10, 13f142
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – FY6800 2-Channel DDS Signal Generator [EU/UK] (-3 USD)
Price history and price alert
Price history (for all/most countries) for FY6800 2-Channel DDS Signal Generator is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).