Where do I buy an inexpensive wireless mouse for my mini laptop?

I am getting a new HP Mini 210 Laptop next week. I hate those little ons you move on them. So I want to buy a wireless mouse with the wheel in the middle. Where would be a place to go to where they don't cost a lot. I've never bought wireless things before, are they pretty dependable? Thank you in advance for those of you who can help.