FlipSky Mini TS100 Soldering Iron (Banggood, Aliexpress: Power Supply Plug: DC5525, Power: 65W, Input Voltage: 100℃-400℃(MAX), Data/Power Interface: Micro USB, Power Saving Temperature: 200℃(Initial setup), Preset Temperature: 300℃(Initial setup) (the best price with coupon)).
Just check coupons out (with price alert and history). Best price?
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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($43.06): BGRCParts8
apply code in your basket (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): BGFlipskyTS100, BGRCPART, 502C6B, AFfbG10, BGCITYADS2019, BGVDay10%off, BG10PARTS, Parts8, BGCityadsRC8, Tabby20
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for FlipSky Mini TS100 Soldering Iron. The lowest price was: $37.39.
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)).