Price history, coupons and price alert are available on this page. What is best price?
Tail stand Yes, Weight 106g, LED Nichia 219B 4500K, Diameter(Head/Body) 32.1 / 27.2 mm, Required battery quantity 1pcs, Reverse polarity protection Yes, Material Aluminum Alloy, Lens type Ar-coated glass and 60 degree bead TIR lens, Driver 12 groups max current output 8000mA / Temperature protection management inside, Length 126.5 mm, Mode memory Yes, CRI Ra>90 /R9>90 /R12>70, Battery type 21700 lithium battery(unprotected and length not more than 71mm) (not included), Low voltage warning Yes, Battery included No, Flux Max 2000LM
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($31.99): FIN5573
2. ($32.29): BGAlerabat15
3. ($33.99): BGS21D
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 and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGtorch3
(there’s a little possibility that old coupon will work)
Price history and price alert
Price history (for all/most countries) for Convoy S21D 219B Flashlight 2000lm 4500K 8A is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).