You can get Voltage Regulator with for 5.99 USD using coupon code (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Best price?
Latest price update (UTC time):
Banggood (5.99 USD)
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood. Low/high price? Hmmm, price is higher than average (which is 4.11 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 5.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGd0b05d, BG2589f4, 00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 8Couponsde, MVC8SPRING, 2203ActiesNL, BG00c906, BGJUNEGSG9, Cuponation9, 9OFFSUMMER, BG589b2e
(probably won’t work, but you can try them out)
Aliexpress
Click here… to search for LM2596 DC-DC Voltage Regulator with Display on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for LM2596 DC-DC Voltage Regulator with Display? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).