Basically copy coupon, view price history or create e-mail price alert. 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):
Working temperature: 0 ~ 40 ° C / 32 ° f ~ 104 ° f, Rated power: 70W, Voltage between welding nozzle and ground: < 2mV, Heating wire voltage: AC 24 V ± 10% 50 Hz, Storage temperature: 20 ° C ~ 80 ° C / - 4 ° f ~ 176 ° f, Temperature range: 100 ° C ~ 480 ° C / 212 ° f ~ 896 ° f, Impedance of welding nozzle to ground: < 2 Ω, Storage humidity: - 35% ~ 45%, Dimension: l150xw136xh93mm ± 5mm, Handle line length: ≥ 120cm, Temperature stability: ± 2 ° C (static), Display form: LCD
Banggood
Banggood warehouse is located in Europe 
. I don’t know if this is a good price – number of records in my database is too low! Only one coupon available!
Link: Banggood product page
1. ($80.99): BGGines
put item in your cart and apply coupon code there 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): CityadsTool, BGAlerabat1, BGPTL088
(these coupons are old, so probably won’t work)
Price history and price alert
There is only one database record (it was for $76.49), so you can’t see price history chart.
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)).