Razer Viper V2s have this problem where the scroll wheel starts skipping. To fix it, you need to disassemble, clean or replace the scroll wheel. If you're into that, this is great for you.
Otherwise you can also use this mouse without using the scroll wheel. It looks and feels practically new. I've used it for less than 200 hours in total in the past 2 years. Bought it together with a gaming laptop but ended up not using it much. You can see it looks basically new from the pictures.
Unfortunately the warranty expired so Razer won't replace.