I have just checked coupons. The lowest price I could get is 37.19 USD for 12V Mini Spot Welding (in Banggood). Price history, coupons and price alert are available on this page. What is the best price?
Latest price update (UTC time):
Banggood (37.19 USD)
Banggood warehouse is located in China. I have no active coupons for you right now. Isn’t it too expensive? Hmmm, price is higher than average (which is 32.91 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 37.19 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BG086eb3, BG20236Tool, BGET10
(these codes were not working in latest coupon update, but you can check them out anyway)
Aliexpress
Click here… to search for 12V Mini Spot Welding Machine on Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 12V Mini Spot Welding Machine.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).