cheapest gaming mouse for cs go for 20$?

I literally bought a mouse for $20 last week on amazon , got a Logitech m510, so far i love it.Its wireless ,battery last around 2-3 years , great response , has 2 side buttons on the left , very helpful but it all depends if you want more features. Works well in csgo .

Unless you can afford hundreds of batteries, Don't get a wireless mouse for gaming.

Probably Gigabyte GM-M6800V2 Optical USB BLACK or Aula Killing The Soul

Don't get gaming mouses that are below 20 bucks. They're not real gaming mouses

I love my Logitech G100S.

This is by far the most comfortable mouse I've used. Tracking and accuracy are top notch so don't let the price fool you.