I can only really speak for the intellimouse I have, it’s a little over 5 years old, cost £25, 4 buttons and a clicky scroll wheel, comfortable to use. Works as well today as the day I bought it, gets maybe 8-10 hours of use 5-6 days a week. Only complaint is the rubberised coating near the side buttons has scuffed up a bit.

I’m not claiming it’s the world’s greatest mouse or anything, but it’s fine, decent.