Should I Buy A New Computer Mouse

[NewYorksFinest]

My Microsoft Mobile Mouse 4000 is almost 2 years old. It still works fine, hopefully even better with my Corsair mousepad. However, it is starting to get old. They "say" it isnt good for gaming, but I use it for gaming and it works fine for me; much cheaper thanm that $100 "gaming" mouse. I am buying another Mobile Mouse. But, is it worth buying? Should I buy a newer one for my computer?