Staples.ca: 50% Off Logitech G400 Gaming Mouse (Pay $29.99)
Really, you don't. Logitech makes great products and this mouse is no exception. Just looking around online shows ratings for this mouse are generally between 4 and 4.5 out of 5. This isn't a super top-of-the-line mouse, I don't think, so if you're a super hardcore gamer then maybe this isn't for you. For some, though, it'll be perfect.
Take me, for instance. I'm not generally a PC gamer, but since I got my laptop, I've been keeping my eyes open for a game to pick up. I'm already swimming in PS3 games so it has to be something especially good. That doesn't matter though, what matters is that I am going to need a mouse for my gaming. Using a track pad does not make for a good gaming experience. Like I said though, I'm not generally a PC gamer so getting a $175 gaming mouse doesn't really appeal to me. A $29.99 gaming mouse on the other hand, is right in my wheel house.
(Expires: 4th January 2013)