Go down and check coupons out. Remember to check price history if it is available. What is 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 and price update (UTC):
10 minutes fixed sleep mode Yes, Temperature Range 200~480°C, Tip of ground Resistance <2Ω, Model 938D, Work temperature 0~40°C, Celsius/Fahrenheit Display Temperature conversion mode Yes, Power 120W, Voltage AC 220V±10% 50Hz/AC 110V±10% 60Hz, Storage temperature -20°C~80°C, Stability of temperature ±2°C(static state), Tip of ground Voltage <2mV, Storage humidity 35%~45%, Temperature display LED digital display
Banggood
Banggood warehouse is located in Europe 
. This is new product in my database, so I don’t know if this price is good. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($45.04): CityadsTool
just apply this code 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): 5efba1, BG938D, BGYH938D, elec, BGsolder15, BG938D1, BG15sh, AFfbG10, WELDTOOL, BGAFF10OFF, BGTT10, bGhOnEy10, BGherra, BGdragonBoat, BGSS10%SW, BgoFErTaSchInA10, BgcLuBofErtA10, BGRUS15, BGWELDTOOL, BGCuponation10, 13f142, BG372479, BG7d39db, BGc225cb, BANGGOODSD, 6GSGIT, BGed73bf, BG8a7644, 00c906
(there’s a little possibility that old coupon will work)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $36.99.
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)).