Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – RD6006-W Digital Control Switch Adjustable Power Supply [EU] (-3 USD)
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (78.19 USD): BG8OFFCOUPON
Coupon (78.19 USD): TTBLACK5
Coupon (79.89 USD): BG00c906
(CouponsFromChina.com tip: put item in your cart and apply coupon code there 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): BGRD6006, BGE13, BGRD6006W, AFfbG10, BGRD6006PS, BGVDay10%off, BGRD03, BGRD04, BGAFF10OFF, BGRDeals, BGTT10, bGhOnEy10, BGRD05, BG6006, BGSS10%SW, BGdragonBoat, BG59cz, bgshOOp10, BGRD06, BGRD46, BgoFErTaSchInA10, BGELIG0920, BGHALLOWEEN, BgcLuBofErtA10, BG06cz, BG06off, bg5906W, 7d18f7, BG06CZ59, BGRUMB15, BGCuponation10, BGHONEY2110, 13f142, BG6e716e, ADMITAD2212, 2022ACTIESNL, BG6006P, BGa48508, BG1e607f, BG177d10, BG563397, BGf43324, BG2589f4, 00c906, Terence, Tabby20, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, BGJUNEGSG9, Cuponation9, COUPONSDE1wk, BGGutscheine
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – RD6006-W Digital Control Switch Adjustable Power Supply [EU] (-3 USD)
Price history and price alert
Price history (for all/most countries) for RIDEN RD6006P DC-DC Voltage Current Step Down Power Supply is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).