You can get FNIRSI 0.25mm Spot Welder for $39.99 using coupon code (in Banggood). Basically copy coupon, view price history or create e-mail price alert. Do you want to know what the best price is?
Latest coupon and price update (UTC):
FNIRSI 0.25mm Spot Welder 4 Gears Adjustable DIY Mini Spot Double Pulse Welding Machine 18650 Battery Pack Welding Tool Built-in 5000mAh Battery
Banggood ($39.99)
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood. Is it good price? According to my database, the average price is $40.37 and current price is $39.99, so it’s probably a good price!
Link: Banggood product page
Price: $39.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
1. (8.11.2024, $33.99): BGc791db
Item: FNIRSI 0.25mm Spot Welder
Countries: CzechRepublic, Greece, Hungary, Poland, Slovakia(SlovakRepublic), Slovenia
2. (1.11.2024, $33.99): BG83d007
Item: FNIRSI 0.25mm Spot Welder
Countries: France, Germany, Italy
Old coupons (from the oldest to the newest): BG424324, BG84b6d7, BGe245a9, BG2dd9fa, BG59c751
(probably won’t work, but you can try them out)
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 FNIRSI 0.25mm Spot Welder 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)).