I have checked all old coupons and price is 29.99 USD for Excellway Plastic (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Latest coupon and price update (UTC):
Banggood (29.99 USD)
Banggood warehouse is located in China. Hmmm… There is no active coupon in Banggood at this moment. Is it expensive? Hmmm, price is higher than average (which is 26.83 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 29.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGET12, BG20236Tool, BGET10, BGe245a9
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Aliexpress
Click here… to search for Excellway Plastic Welder 100W on Aliexpress
Here are coupons that you can use.
Price history and price alert
Do you need price history chart (for all/most countries) for Excellway Plastic Welder 100W? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).