Latest update shows that 25mm 80-5000 costs 12.69 USD (in Banggood). You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Latest price update (UTC time):
Banggood (12.69 USD)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Well, is it a good price anyway? Hmmm, price is higher than average (which is 6.99 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 12.69 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGGines, BG75cb17, BGTools8, BGTACC18, BG85053c, BG589b2e, BG03c81a, BGHTT15, BGb069cc, BG20236Tool
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 100pcs 25mm 80-5000 Grit Sanding Paper with 1/8 Inch Pad.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).