When I was updating this page, then coupon price was $45.99 for 858D 700W Soldering Station (in Banggood). Price history, coupons and price alert are available on this page. Best price?
Latest coupon code price check (UTC time):
Model: 858D, Airflow: 120L/min(max), weight: 1.25kg, Resistant: <2Ω, heating components: chinaware, power consumption: 700W, Temp Control: 100~480℃, output voltage: (AC24V), type: LED digital display, Temp Stability: ± 1'C, handle length: 100cm, dimension: 138mm(H)*10mm(W)*150mm(L), Voltage: 110V / 220V, Fan: Brushless ball, Handpiece Size: <23mm, Noise: <45dB
Banggood ($45.99)
Banggood warehouse is located in China. Too bad there’s no coupon right now in Banggood. Low/high price? Cool, average is $47.53, so current price is lower!
Link: Banggood product page
Price: $45.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG589b2e, BGSaleFeb8, BGHTT15, BG20236Tool, BGCOUPERTBF8, BG5f885a
(there’s a little possibility that old coupon will work)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 858D 700W Soldering Station 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)).