Supported Systems: Windows 7/8.1/10, Resolution: 500-1000-1500-2000-2500DPI Adjustable, Dimension: 125*67*40mm±0.15mm, for Mac OS 10.3 or later, Cable Length: 1.7M, Button Press Distance: 0.7mm, Number of Buttons: 7, Button Press Force: 65±10g, Rated Voltage / Current: DC 5V / <100mA, Button Press Life: Up to 30 million times. Go down and check coupons out. Remember to check price history if it is available. What is best price?
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.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($7.79): 915111
2. ($11.04): 502C6B
apply code in your basket (cart) after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 1f17e2
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Do you need price history chart (for all/most countries) for HP M220 2500DPI Mouse? There we go. The lowest price was: $7.79.
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)).