I've just started playing Just Cause 2. There are a lot of extra keys to press to do different things. Maybe it's my age but I'm finding it harder to press the right keys and realized this game (and at least one other game I've tried playing recently) seems to be a perfect fit for a controller. I'm a keyboard and mouse guy so I don't want to spend a lot for a controller I may use for one or two games or not at all. However, I also want a controller that's gonna be useful if I decided I like it (or age and dexterity force me into using it). I bought one from Wal-Mart about 2 years ago but it never wanted to play nice with any of my computers so it was recently placed in my circular filing can. Ideally I'd like to keep it to $20 or less. Any suggestions?