$21.99 – Drillpro Electric Hot Melt Glue Gun (Banggood, Aliexpress: Drillpro Electric Hot Melt Glue Gun with Rapid Heating Intelligent Temperature Control for DIY Crafting Works with 10PCS Glue Sticks Fit For Mak 18V Battery Convenient and Efficient Use (the best price with coupon)).
I have just checked coupons. The lowest price I could get is $21.99 for Drillpro Electric Hot Melt Glue Gun (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood ($21.99)
Banggood warehouse is located in China. There are no active coupons for this product, but the price is pretty low isn’t it? What about the price? Let’s see… Average price for this item is $22.82 and current one is $21.99, so it’s a good price!
Link: Banggood product page
Price: $21.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/feV
Old coupons (from the oldest to the newest): BG1a23e3
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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 Drillpro Electric Hot Melt Glue Gun is here. The lowest price was: $19.99.
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)).