You can get SEEKNITE ST02 365nm UV for 19.95 USD with coupon (from Banggood). Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Latest coupon code price check (UTC time):
Banggood (19.95 USD)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Price? Hmmm, price is higher than average (which is 14.65 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 19.95 USD
Old coupons (from the oldest to the newest): M8192, BG1128, FIN9692, BGAFF10OFF, FIN2692, BG10OFFAFF1, BG7726, BANGGOODSD, 6GSGIT
(these coupons are old, so probably won’t work)
Aliexpress
Click here… to search for SEEKNITE ST02 365nm UV Flashlight 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 SEEKNITE ST02 365nm UV Flashlight? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).